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Oral presentations / Lectures

Note: Each oral presentation will be assigned with 12 min for talk followed by few-min discussion.
The number of “00” means an invited lecture which will be assigned with 20 min for talk followed by 5-min Q&A.
The asterisk (*) means an applicant for the Young Scientist Award – its voting & selection will be made on Thursday.
Mon 16 Sep, 9:20-9:50

Special Lecture

Chair:   Helen Khoury (Brazil)

Trends and future of solid state dosimetry

Anatoly Rosenfeld (Chair of ISSDO) [view more]

The current state-of-the-art in the solid state dosimetry are briefly reviewed and some vision on future trends of advancements in solid state dosimetry technology and their various applications are presented.

Mon 16 Sep, 9:50-10:30

Keynote Lecture

Chair:   Claus Andersson (Denmark)

Dosimetric consideration for children in radiation therapy and diagnosis

Saveta Miljanic (Ruđer Bošković Institute, Croatia) [view more]

There is well established evidence that radiation therapy is making a crucial contribution to long-term survival of childhood cancers, but it is also causing a high evidence of secondary cancers among survivors of childhood cancer. The measurement of out-of-field doses (including concomitant imaging doses) for paediatric population is important for input to epidemiological studies and risk estimations.

Mon 16 Sep, 11:00-12:30

Session 1: Monitoring and detection (1)

Chair:   Adrie Bos (The Netherlands),   Mukund Kulkarni (India)

O01-00. Quantum radiation imaging for biomedical applications

Hiroyuki Takahashi (University of Tokyo, Japan) [view more]

Positron emission tomography and other radiation imaging techniques provide biological functions and molecular information. We are developing new sensor technologies and studying new imaging methods, which can be used for new cancer diagnostics and high-resolution tracer imaging, as well as new dosimetry applications.

O01-01. External Dose-Rate Measurements Based on Smartphones CMOS sensors

Alessia Mafodda* (Helmholtz Zentrum Muenchen , Germany)

Main goal of this scientific investigation is the characterization of two applications (“RadioactivityCounter and “GammaPix”) that enable dose-rate measurements with an ordinary smartphone, using the CMOS sensor of the built-in camera as a radiation detector.

O01-02. Entrance surface dosimetry with radiophotoluminescent polymer films

Francesco d’Errico (Universita di Pisa, Italy / Yale University, School of Medicine, USA)

Thin polymer films loaded with luminescent materials have been developed for entrance surface dosimetry in radiation protection and clinical applications. Most notably, the films can be shaped as gloves and measure extremity doses without interfering with the tactile sense. Their photon energy dependence improves when worn under shielding gloves.

O01-03. How to Use Active Personal Dosemeters in Interventional Fields in Hospitals: Results from Laboratory and Workplace Field Tests

Filip Vanhavere (SCK-CEN, Belgian Nuclear Research Centre , Belgium)

A series of tests have been performed on active personal dosemeters (APD), with the emphasis on their use in interventional radiology/cardiology radiation fields. The results lead to some recommendations and attention points, mainly focused on the influence of pulsed fields and the lead apron backscatter.

O01-04. EURADOS Intercomparison for Calibration Methods using KIT H*(10) Area Dosemeters

Christian Naber (Karlsruhe Institute of Technology (KIT) , Germany)

The international intercomparisons for calibration methods of passive dosemeters IC2017calm and IC2018calm were organized by EURADOS to study the precision of calibrations of participating dosimetry services and institutes.

Mon 16 Sep, 14:00-16:00

Poster Session 1 (Monitoring, detection, instrumentation, etc.)

Mon 16 Sep, 16:00-17:30

Session 2: Monitoring and detection (2)

Chair:   Michael L.F. Lerch (Australia),   Satoshi Kodaira (Japan)

O02-01. A new sensitization method combining CO2 and UV treatments in a two-phase etching protocol for improved neutron dosimetry with CR 39 track detectors

Daniel Andrade Azevedo de Vasconcelos* (Universita di Pisa, Scuola di Ingegneria , Italy)

Under optimized conditions, CO2 and UV treatments combined in an original two-phase etching technique increase the total number of tracks by more than 230 % in nuclear track detectors, and the maximum diameter of the tracks by more than 60 %, compared to the standard routine processing.

O02-02. Extending information relevant for personal dose monitoring gained from glow curves of passive solid state dosemeters using artificial neural networks

Florian Mentzel* (Lehrstuhl fur Experimentelle Physik 4, TU Dortmund, Germany)

We present studies using artificial neural networks to investigate the time- and temperature-resolved photon counts from thermoluminescence dosemeters that can yield accurate information not only about the irradiation dose, but also about the time of the irradiation, the number of irradiation fractions and the radiation type. Applied to personal dose monitoring, this introduces additional value to the use of passive dosemeters.

O02-03. EURADOS Intercomparisons for Individual Monitoring Services: Results of the 2016 and 2018 Whole Body Dosemeters Intercomparison for Photon and Beta radiations

Hannes Stadtmann (Seibersdorf Labor GmbH, Austria)

This paper presents the organization details and the analysis of results of the EURADOS intercomparisons 2016 and 2018 for whole body dosemeters in photon and beta fields.

O02-04. Results of the EURADOS 2017 Intercomparison for Whole Body Neutron Dosemeters (IC2017n)

Sabine Mayer (Paul Scherrer Institute, Department of Radiation Safety and Security, Switzerland)

IC2017n was the second EURADOS intercomparison exercise for neutron dosemeters after IC2012n. Previous proficiency tests for neutron personal dosimetry at an international level have been performed irregularly every 8 to 10 years only.

O02-05. Passive detector responses at spark discharge simulating lightning discharge in laboratory conditions

Dagmar Kyselová (Nuclear Physics Institute of the CAS, Czech Republic)

Preliminary measurements indicate that passive detectors show a significant increase in their response when exposed at high current and high voltage generators simulating lightning discharge in laboratory conditions.

O02-06. Microdosimetry of Cosmic Ray Shower atop Mount Zugspitze in Bavaria Germany using a TLD Microdosimeter

Bhaskar Mukherjee (School of Physics / The University of Sydney, Australia)

(a) Interaction of high-energy protons from galactic origin with the air molecules in the Earth’s atmosphere generates Cosmic Ray Shower (CRS). (b) The CRS is composed of neutrons, electrons, protons, photons, muons and pions of diverse energy and intensity distributions. (c) A TLD-microdosimeter (LiBe-14) based on LiF and BeO TLD chip was developed. (d) LiBe-14 microdosimeter was used to assess the ambient dose equivalent of the CRS at “Kugel Alm” Laboratory located atop mount Zugspitze at the Environmental Research Station (UFS Schneefernerhaus; 2650 m above sea level).

Tue 17 Sep, 9:00-10:30

Session 3: Instrumentation and detectors (1)

Chair:   Pawel Bilski (Poland),   Toshio Kurobori (Japan)

O03-00. Current status and future prospect of RPL glass dosimeter

Takayoshi Yamamoto (Osaka University, Japan) [view more]

The glass dosimeter (GD) which utilizes the phenomenon of radio- photoluminescence (RPL) is applied to various fields in addition to the individual monitoring. Especially, in order to contribute to restoration of the contaminated area in Fukushima the bead-type and sheet-type glass dosimeters have been developed and utilized to observe the distribution of radioactive contaminants. The new glass material that is resistant to severe environment of high temperature has been developed.

O03-01. Harmonically modulated optically stimulated luminescence (HM-OSL) : principles and application

Arkadiusz Mandowski (Institute of Physics, Jan Dlugosz University, Poland)

New OSL technique is presented – the harmonically modulated optically stimulated luminescence (HM-OSL). During HM-OSL the stimulating light changes sinusoidally. The OSL response is also sinusoidal. The phase shift between stimulation and OSL is related to several trap parameters. The HM-OSL method was implemented in the Helios OSL reader.

O03-02. Design of a new Al2O3:C OSL sensor for extremity and lens of eye

Marc Million (Landauer , France)

A new sensor based on Al2O3:C has been designed based on the Bragg-Gray cavity theory to improve its energy response. An optimization of the physical parameters using Monte Carlo modeling is presented along with a comparison with experimental results. The metrological performance versus IEC 62387 requirements is also discussed.

O03-03. Novel Disk-Shaped OSL Dosimeter Having Smaller Angular Dependence

Sota Goto* (Kanazawa University / National Institute of Advanced Industrial Science and Technology, Japan)

To improve angular dependence of a passive-type OSL dosimeter, we fabricated a novel disk-shaped dosimeter which consists of two sensitive regions. The angular dependence of our dosimeters improved without significant loss of the detection efficiency from the results of simulation and experiment

O03-04. Spatial radiation dosimetry based on various OSL materials embedded into silicone elastomer matrix

Michal Andrzej Sadel* (Institute of Nuclear Physics Polish Academy of Sciences , Poland)

A new approach to the spatial radiation dosimetry based on optically-stimulated luminescence (OSL) is presented. By embedding OSL-active particles into a transparent silicone elastomer matrix, the favorable dosimetric properties of an OSL material are exploited towards spatial OSL dosimeter. The new dosimeter formula, carry the advantages known from personal dosimetry: which is its reusability as they can be reset e.g. by an intense light field (bleaching) as well as storage ability as the dose following irradiation can be stored with extended periods of time.

Tue 17 Sep, 11:00-12:30

Session 4: Instrumentation and detectors (2)

Chair:   Vadim Chumak (Ukraine),   Masanori Koshimizu (Japan)

O04-01. Latest advances in FNTD technology and instrumentation

Mark Akselrod (Landauer , United States of America)

The next technological breakthrough in tools for radiation protection, medical dosimetry and radiobiology research was achieved with Fluorescent Nuclear Track detectors (FNTD) that have some important advantages in measuring neutrons, high energy heavy charge particles (HCP) and even electrons and photons. Second generation of FNTD reader with improved image quality and 30 times faster scanning was developed.

O04-02. MBD-2 : A Direct Reading Multi-Functional Dosimeter for Emergency Response, Military and Occupational Dosimetry

Juergen Fellinger (Mirion Technologies , Germany)

The MBD-2 Personal Dosimeter is a device which incorporates the benefits of passive radiation detection with active, self-reading and recording functionality but without alarm indication capability. It is a wrist worn watch-type of dosimeter suitable for photon and neutron dose measurements. Data transfer is achieved via Near Field Communication (NFC) or Bluetooth Low Energy (BLE) communication to a smart device (phone, tablet, laptop).

O04-03. Development of a prototype thermal neutron dosimeter based on a color-based quasi-digital neutron/gamma discrimination

Gabriele Zorloni (Politecnico di Milano , Italy)

In this study, we propose an original approach for particle discrimination in a mixed radiation field using scintillators. The method relies on the possibility to identify the point of interaction in a phoswich detector from the emission spectra of the produced scintillation light, using optical filters as passive selectors. As a proof of concept, we developed a compact prototype thermal neutron active dosimeter for mixed neutron/γ fields.

O04-04. The MIDAS dosimeter/particle monitor of charged particles and neutrons for space environment

Charalambos Pan Lambropoulos (ADVEOS microelectronics PC / University of Athens, Greece)

Radiation doses received by astronauts outside the geomagnetic field are a main risk factor for human space exploration. Determination of LET spectra is necessary in the standard paradigm of risk assessment for mixed radiation fields1), because it allows calculation of dose equivalent, while identification of ions by species (or at least by group) is required, if the risk assessment tools developed by NASA are used. The MIDAS device is developed with purpose to achieve mass <50 g, volume < 5 x 5 x 1 cm3 and power consumption <10 mW for an instrument capable to determine the fluence spectrum as a function of charge and energy of the impinging particles, at least for those species with the most significant contribution to dose in space. In addition it is capable to measure fast neutron spectra for use either in the ISS environment or as radiation monitor.

O04-05. Characterization of a pixelated silicon microdosimeter in microbeams of light ions

Davide Mazzucconi (Politecnico di Milano, Italy)

Characterization of a pixelated silicon telescope using a microbeam. The low energy tail of the spectrum is due to partial collection of the charge. This solid state telescope is a suitable device for measuring the microdosimetric quantities of light-ion beams.

O04-6. Tailor-made 3D Dosimeter Based on 3D Printing Technology

Takeshi Fujiwara (National Institute of Advanced Industrial Science and Technology, Japan)

We succeed in fabricating tailor-made 3D dosimeter with radiochromic material and 3D printer. We propose the novel method to precisely copy the shape of personal internal organs with our 3D printed dosimeter, and use for the more accurate and safe radiotherapy.

Tue 17 Sep, 14:00-16:00

Poster session 2

Tue 17 Sep, 16:00-17:30

Session 5: Basic physical process (1)

Chair:   Sergey Nikiforov (Russia),   Takayuki Yanagida (Japan)

O05-00. Microdosimetric modelling of radiation-induced luminescence

Alessio Parisi (Belgian Nuclear Research Centre SCK•CEN, Belgium) [view more]

This talk presents the recently developed Microdosimetric d(z) Model able to describe and predict the relative efficiency of luminescent detectors for measuring different radiation qualities by studying the changes in the microscopic pattern of energy deposition through an analysis of the simulated microdosimetric specific energy probability distributions in nanometric targets. The model was tested for different types of luminescent detectors, showing a very good agreement with experimentally determined efficiency data.

O05-01. Quantum tunneling processes in luminescence materials: applications in retrospective dosimetry, temperature sensing and thermochronometry

Vasilis Pagonis (McDaniel College, United States of America)

New experimental data are presented for both natural and laboratory made dosimetric materials, and they are fitted using a quantum tunneling model for luminescence processes. New analytical equations are derived, which are useful metrics in the research areas of retrospective dosimetry, temperature sensing and thermochronometry.

O05-02. Infra-red photoluminescence, a step change in trapped charge dating

Mayank Jain (Center for Nuclear Technologies, Technical University of Denmark, Denmark)

Infrared photoluminescence (IRPL), a new method of trapped charge dating based on non-destructive probe of trapped electrons.

O05-03. Role of ionizing radiation on the formation of defects within LiF:Mg

Guerda Massillon-JL (Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Mexico)

For more than 70 years, defects responsible for the thermoluminescent (TL) glow-curve have been studied experimental and theoretically without a complete understanding. For the first time, a quantum approach based on first principle is used to investigate the role of ionizing radiation on the formation of defects induced by Mg and Ti interstitials in LiF. The results indicated that most of the defects that might be responsible for the complex TL glow curve are created by ionizing radiation.

O05-04. Radiophotoluminescence from Ag-doped Alkali-phosphate Glass in Real Time, During Irradiation with a LINAC X-ray Beam

Stephen W.S. McKeever (Department of Physics / Oklahoma State University , United States of America)

The real-time response of radiophotoluminescence (RPL) from Ag-doped alkali-phosphate glass during irradiation with high-energy pulsed X-rays from a LINAC is reported. The non-linear growth of RPL versus irradiation time is correlated with the build-up effect for RPL in this material.

Wed 18 Sep, 9:00-10:30

Session 6: Dating and dose reconstruction (1)

Chair:   François Trompier (France),   Shin Toyoda (Japan)

O06-01. Bleaching and dose response studies on Al-hole Electron Spin Resonance (ESR) signals in sedimentary quartz

Alida Timar-Gabor (Interdisciplinary Research Institute on Bio-Nano-Sciences, Babes-Bolyai University, Romania)

Residual dose correction mandatory in ESR dating using Al-hole signals-ESR residuals of Al-hole signals yield hundreds of Gys.
Al-hole residuals increase exponentially with preceding given dose. Mechanism of Al-hole bleaching by electron-hole recombination is supported.
Al-hole signals measured at 90 K are heavily interfered by signals form intrinsic defects (peroxy radicals)
A sum of a single saturating exponential function and a term proportional to the square-root of the accumulated dose describes well the dose response curve of Al-hole signals

O06-02. The LnTn method: a new method for determining equivalent doses for luminescence dating of sediments

Bo Li (Atmospheric and Life Sciences, University of Wollongong / ARC Centre of Excellence for Australian Biodiversity and Heritage, University of Wollongong, Australia)

A new method of determining equivalent dose (De) for luminescence dating of sediments is presented. This method overcomes the De underestimation problem associated with conventional methods when dating old samples.

O06-03. Beta dose heterogeneity in sediment samples measured using a Timepix pixelated detector: implications for single-grain OSL dating

Xiao Fu (School of Earth Sciences, Zhejiang University, China / Atmospheric and Life Sciences, University of Wollongong, Australia)

Timepix analysis allows spatially-resolved beta dose rates to be estimated for intact sediment samples; Beta dose rates of archaeological and geological samples were studied using this technique and compared with single-grain De values; Beta dose rate heterogeneity contributes about 10–20% to the observed spread in De values for the samples studied.

O06-04. L Band Electron Paramagnetic Resonance Tooth Dosimetry using affected Cattles’ Teeth in Fukushima

Ichiro Yamaguchi (National Institute of Public Health , Japan)

The positive Electron Paramagnetic Resonance (EPR) signals possibly due to radiation exposure were nondestructively detectable among affected Cattle in Namie town, Fukushima even by using L Band Electron Paramagnetic Resonance Tooth Dosimetry.

O06-05. Fabrics for short term dosimetry following a radiological emergency: results of a blind test

Lily Bossin (Durham University / Public Health England, United Kingdom)

Fabrics were used to reconstruct dose following a blind gamma irradiation using luminescence techniques; An indicative accuracy sufficient for medical triage in a radiological emergency was obtained; The use of fabrics potentially provide spatial mapping of dose; Advantages of this approach are the wide availability of fabrics and prompt processing of samples.

O06-06. Investigation of the dose-response in re-irradiated fingernails and combined effect of drying time-temperature to the ESR signal

Chryzel Angelica Gonzales* (Graduate School of Biomedical and Health Sciences / RIRBM, Hiroshima University, Japan)

Individual variability in the dose-response curves in re-irradiated fingernails was observed. Increasing drying temperature and time generates strong ESR signals.

Wed 18 Sep, 11:00-12:30

Session 7: Basic physical process (2)

Chair:   Harry Cullings (USA),   Go Okada (Japan)

O07-01. Features of PHITS in Terms of Detector Response Simulations

Tatsuhiko Sato (Japan Atomic Energy Agency , Japan)

Particle and Heavy Ion Transport code System, PHITS, is a general purpose Monte Carlo code that can simulate the motion of various particles over wide energy ranges, using several nuclear reaction models and data libraries. This paper summarizes the features of specific functions useful for detector response simulations implemented in PHITS

O07-02. Unified Interaction Model simulation of the effect of optical excitation on the TL dose response of LiF:Mg,Ti (TLD-100)

Yigal Shalom Horowitz (Ben Gurion University of the Negev, Israel)

The intent of this research is to modify the TL dose response of composite peak 5 via excitation following irradiation at appropriate photon excitation energies and to obtain a linear dose response up to at least 30 Gy.

O07-03. A simplified analysis of the recombination mechanism in LiF:Mg,Ti (MTS-N) near peak 5.

Ewa Mandowska (Jan Dlugosz University , Poland)

Recombination mechanism in LiF:Mg,Ti detectors (MTS-N) was studied based on spectrally resolved thermoluminescence (SR-TL) measurements. It was found that in the vicinity of the peak 5 of MTS-N detectors the recombination does not obey the pure localized nor pure delocalized mechanism.

O07-04. A Monte-Carlo study of the fading of the TL and OSL signals in the presence of deep-level competitors

Reuven Chen (School of Physics and Astronomy, Tel Aviv University, Israel)

The fading of thermoluminescence (TL) and optically stimulated luminescence (OSL) has been studied within the framework of a model with deep-level competing traps, using Monte-Carlo simulations.

O07-05. Radial Electron Fluence around Ion Tracks as a Physical Parameter to Describe the Detection Thresholds of Etched Track Detectors

Tomoya Yamauchi (Graduate School of Maritime Sciences, Kobe University , Japan)

Progress is presented on the studies of Radial Electron Fluence around Ion Tracks, REFIT, which has been proposed to describe the detection thresholds of etched track detectors, including the relationship with former experimental results.

O07-06. The effect of charge imbalance on luminescence production

Martin Autzen (Nordic Luminescence Laboratory for Luminescence Dating, Aarhus University , Denmark)

High dose irradiation of quartz with 100/200 keV electrons shows a cumulative effect on the luminescence sensitivity, irreversible unless heated to high temperatures (500-700oC). We attribute at least part of these observations to the accumulation of negative charge in the phosphor grains.

Wed 18 Sep, 9:00-10:30

Session 8: Medicine and biology (1)

Chair:   María-Ester Brandan (Mexico),   Hiroshi Watabe (Japan)

O08-01. Real-time and Direct Measurements of BNCT Neutron Beam at KURRI and NCC Facilities Using DAD-BNCT.

Masashi Takada (Dept. of Appl. Phys., National Defense of Academy in Japan, Japan)

BNCT neutron beams can be measured in real time, directly, and easily using the neutron detector (DAD-BNCT) based on combination of thin silicon sensor and thin LiF radiator. The DAD-BNCT can measure thermal neutrons produced at KURRI and NCC BNCT neutron beams, up to 1×109 (n/cm2/s), separately from gamma rays with high dose rates around 500 mGy/h. The DAD-BNCT presents good linear response to neutron flux, and also, could be used to monitor BNCT beams.

O08-02. Measurement of Stray Neutrons with Electronic Neutron Dosimeter in Scanning Ion Beam Therapy

Vladimir Mares (Helmholtz Zentrum Munchen , Germany)

The neutron personal dose equivalent, Hp(10), was measured with an electronic neutron dosimeter (ELDO) at different positions around a PMMA phantom at the Heidelberg Ion-Beam Therapy Center (HIT), Germany. The PMMA phantom was irradiated with a mono-energetic beam of protons, helium ions, carbon ions and oxygen ions delivered to the fixed horizontal quality assurance (QA) beam line. Pencil beam scanning (PBS) dose delivery technique was used.

O08-03. Characterisation of novel 1- and 2-dimensional silicon diode arrays for range and spot size verification in spot-scanning proton therapy

Emily Debrot (Centre for Medical Radiation Physics, University of Wollongong, Australia)

Silicon diode array detectors implemented in various modalities for fast and high resolution beam profiling and range determination for clinical proton therapy beams.

O08-04. High-resolution fibre-optic dosimetry in microbeam radiation therapy

James Archer (Centre for Medical Radiation Physics, University of Wollongong, Australia)

Plastic scintillator fibre-optic dosimeters have been tested for their applicability in synchrotron radiation therapy. Microbeams have been resolved with a 10 μm resolution probe. Sensitivity remains a challenge for this method of dosimetry.

O08-05. High-resolution dose profiles measurements for Leksell Gamma-Knife Model C and Icon with a stereotactic diode, micro-diamond detector and ionisation chamber

Luka Luketin (University Hospital Centre Zagreb, Croatia)

Leksell Gamma Knife dose profiles measured with the small volume point detectors show excellent agreement with the profiles measured in the standard reference geometry with the radiochromic dosimetry film

O08-06. Graphite calorimetry for quantifying ionization quenching in plastic scintillators in proton dosimetry

Jeppe Brage Christensen* (Center for Nuclear Technologies, Technical University of Denmark, Denmark)

The response of plastic scintillators and ionization chambers, unlike calorimeters, depend on the linear energy transfer (LET). We propose a graphite calorimeter to investigate the quenching in scintillators and the effect of the LET from all particles.

Wed 18 Sep, 11:00-12:30

Session 9: Radiation safety and security

Chair:   Markus Figel (Germany),   Satoru Nakashima (Japan)

O09-00. Radiation security and safety in Africa

Makaiko Chithambo (Rhodes University , South Africa) [view more]

The issues of safety and security involving nuclear and other radioactive materials in Africa are to be discussed.

O09-01. Development of a UAV based spectro-dosimetric system for radiological surveillance

Maksym Luchkov (Division 6.3 – Radiation Protection Dosimetry, Physikalisch-Technische Bundesanstalt, Germany)

The unmanned airborne monitoring system on the basis of a CeBr3 spectrometer is being developed to meet the need for a fast acquisition of metrologically sound data on a large-scale ground contamination following a radiological emergency.

O09-02. Occupational radiation dose to the lens of the eye for physicians from neurovascular interventional radiology procedures

Meng-En Lian* (Institute of Nuclear Engineering and Science, National Tsing Hua University, Taiwan)

The complexity and machine settings of neurovascular interventional radiology (NIR) procedures result in significantly high occupational exposure to physicians. However, there is a lack of actual measurement and assessment of eye lens dose in recent studies in NIR procedures. In this research, clinical measurements of Hp(3) and Hp(0.07) provide not only the direct dosimetry to the eye lens but also the correlation between eye lens dosimeters and additional over-apron neck personal dosimeters for the estimation of eye lens dose when only Hp(0.07) is available in clinical practices.

O09-03. The response of the Glass Badge system for mixed irradiation

Michiko Ube (Chiyoda Technol Corporatoin, Japan)

The responses of the Glass Badge (GB) system for mixed irradiations were assessed. The responses for 14 877 mixed irradiation combinations with two different radiation qualities were evaluated. It was confirmed that the calculated dose with the GB system was sufficient for practical use. The GB system was met the requirement of IEC 62387 standard.

O09-04. ARADOS: Asian network for radiation dosimetry

Osamu Kurihara (National Institutes for Quantum and Radiological Science and Technology , Japan)

Asian Radiation Dosimetry Group (ARADOS) was established in 2015 with a main purpose to promote collaborations on the relevant activities among Asian countries. Members of ARADOS discussed its missions and structure in past annual meetings and several collaborative study projects have been launched in the last years. Strategies to further activate ARADOS are now being considered for the next step.

Thu 19 Sep, 9:00-10:30

Session 10: Dating and dose reconstruction (2)

Chair:   Alicja Chruścińska (Poland),   Jungil Lee (Republic of Korea)

O10-00. Dose reconstruction using surrogate dosimetry materials: the potential of fabrics

Ian Kenneth Bailiff (University of Durham, United Kingdom) [view more]

The prompt measurement of dose to individual members of the public exposed during a radiological emergency is critical to medical triage. An assessment is made of the luminescent properties of polymer-based fabrics used in the manufacture of clothing and accessories and their potential to be deployed as dosemeters.

O10-01. TL investigation of glasses from mobile phone screen protectors for radiation accident dosimetry

Celine BASSINET (IRSN , France)

The dosimetric properties of glasses extracted from screen protectors for mobile phones are investigated using thermoluminescence. Their potential use as fortuitous retrospective dosimeters in the event of a radiological accident is discussed.

O10-02. A EURADOS inter-laboratory comparison on retrospective dosimetry using OSL/TL of electronic components and display glass from mobile phones

Clemens Woda (Helmholtz Zentrum Muenchen , Germany)

Uncertainty for OSL on resistors around 25 % (1 sigma); TL method on display glass validated for arbitrary phone sample; ISO 13528 useful for statistical analysis

O10-03. OSL dosimetry with protective glasses of modern smartphones: a fiber optics non-destructive approach

Sergey Sholom (Oklahoma State University , United States of America)

Protective glasses of modern smartphones were tested with an optically stimulated luminescence (OSL) technique. An optical fiber was used to deliver the stimulation light to the glass and collect the emission back. This enables the potential for the prompt dose evaluation without disassembly of the phone. The current sensitivity of this technique is several Gy depending on the phone manufacturer and model.

O10-04. Comparison of Experiments and Simulations using OSL from phones, TLDs and Monte Carlo Calculations on a Gamma-Irradiated Phantom

Elena Bakhanova (National Research Center for Radiation Medicine, Ukraine)

Dosimetry of a gamma-irradiated phantom exposed in different geometries. Dose estimation using MC simulations and comparison with experimental measurements using external smartphones and internals TLDs. Calculations of conversion factor for dose from smartphones to dose to internal organs.

Thu 19 Sep, 11:00-12:30

Young Scientist Award Slam

Thu 19 Sep, 14:00-16:00

Poster session 3

Thu 19 Sep, 16:00-17:30

Session 11: Medicine and biology (2)

Chair:   Steffen Greilich (Germany),   Hideyuki Mizuno (Japan)

O11-00. Challenges and opportunities in radiation therapy dosimetry

Gabriel Sawakuchi (The University of Texas MD Anderson Cancer Center, United States of America)[view more]

Solid-state detectors have favorable features with potential to develop the next generation of detectors for applications in complex radiation fields generated by new radiotherapy technologies.

O11-01. Recent development of solid state microdosimetry and its applications in proton therapy

Anatoly Rosenfeld (Centre for Medical Radiation Physics, University of Wollongong , Australia)

A proton pencil-beam scanning (PBS) and passive double scattering (DS) systems at the proton therapy centres at Massachusetts General Hospital (MGH), USA and University Medical Center Groningen (UMCG), Netherlands have been characterised using 3D silicon microdosimeter. Recently measured dose mean lineal energy values (yD) ̅at UMCG were compared to LETd values calculated for delivered plan by Raystation (v5.99) treatment planning system (TPS) in a head and neck anthropomorphic phantom and the relative biological effectiveness (RBE) of the beam are presented.

O11-02. 3-D Clinical Small Field Dosiometry

Cheng-Shie Wuu (Columbia University , United States of America)

There has been a rapid increase in the use of small fields in modern radiotherapy techniques such as stereotactic radiosurgery (SRS) and stereotactic radiotherapy (SBRT). The dosimetry of megavoltage small fields can be challenging due to lateral charged particle disequilibrium, detector volume averaging effect, and high dose gradients. 3-D radiochromic plastic dosimeter, PRESAGE, can be used to acquire small-field beam data as well as patient-specific IMRT/VMAT QA precisely and accurately.

O11-03. 4 MV X-ray detection using a novel condenser dosimeter with disposable silicon-diode substrates in radiation therapy

Satoshi Yamaguchi (Department of Radiology, Iwate Medical University , Japan)

We developed an integral condenser dosimeter with a surface-mounted silicon X-ray diode, Patient-skin doses using 4 MV radiotherapy can be measured, Integral doses measured corresponded well to those of ionization chamber with small SDs.

O11-04. LET and RBE of therapeutic proton beams monitored with microdosemeters

Paolo Colautti (LNL-INFN, Italy)

A mini-TEPC without gas flow measures yD and µRBE of a therapeutic proton beam. The yD values are equal to (LET)D calculated values. The µRBE values are almost the same as the RBE values. The detector response does not change over time.

Fri 20 Sep, 9:00-10:30

Session 12: Materials characteristics

Chair:   José-María Gómez-Ros (Spain),   Hirokazu Miyoshi (Japan)

O12-00. A review on the OSL of BeO in light of recent discoveries – the missing piece of the puzzle?

Eduardo Yukihara (Paul Scherrer Institute, Switzerland) [view more]

This presentation reviews the data on the optically stimulated luminescence (OSL) of BeO in light of the recent discovery of strong thermally transferred OSL (TT-OSL) in this material. We discuss how the existing contradictions may be solved by the new information available and present a model for BeO that takes into account these findings.

O12-01. Designing phosphors for dosimetry with tailored properties: an investigation using doped MgO

Luiz Carlos de Oliveira (Universidade de Sao Paulo , Brazil)

TL and OSL signals of MgO doped with various lanthanides were investigated. A recombination mechanism for the TL and OSL signal in MgO was proposed.

O12-02. Phosphor Development for radiation dosimetry

Bhushan Dhabekar (Bhabha Atomic Research Centre / Homi Bhabha National Institute, India)

The paper discusses dosimetric characterization of various phosphors developed at Bhabha Atomic Research centre (BARC)

O12-03. Characterization of electron traps in a natural aluminosilicate (feldspar) by low temperature photoluminescence excitation-emission spectroscopy

Raju Kumar* (Center for Nuclear Technologies, Technical University of Denmark, DTU Riso Campus, Denmark)

New approach to obtain optical trap depth and excited states of the principal trap in feldspar. UV resonance in the excitation spectra indicates the existence of a deep electron trap.

O12-04. Perspective of silicate materials for dosimetry applications

Jose Fernando Diniz Chubaci (LACIFID, Institute of Physics, University of Sao Paulo, Brazil)

TL, PL and optical absorption of calcium silicate produced in our Laboratory was studied. The results indicate that calcium silicate undoped or doped with silver could be suitable for use as TL, OSL or RPL dosimeters.

O12-05. Highly sensitive novel silica-based materials for radiation detection

Ruth Elizabeth Shaw (University of Adelaide , Australia)

The radiation response of rare earth doped silica glasses fabricated using powder sintering (REPUSIL) and melt quenching (termed SAL) were investigated. Extreme sensitivity was observed and rare earth doped glasses were identified for a range of radiation detection applications.

Fri 20 Sep, 11:00-12:30

Session 13: Medicine and biology (3)

Chair:   Susana de Souza Lalic (Brazil),   Satoru Endo (Japan)

O13-01. Dose estimation of electrons and positrons from 64Cu using fluorescence nuclear track detector

Tamon Kusumoto* (National Institutes for Quantum and Radiological Science and Technology, Japan)

Absorbed doses from 64Cu are evaluated using Fluorescence Nuclear Track Detector (FNTD).

O13-02. Comparative study of dose distribution with conventional mammography and microdose using radiophotoluminescent glass dosimeters (RPL)

Sonia Hatsue Tatumi (Federal University of Sa Paulo , Brazil)

RPL dosimeters were applied to measurements of mammograph diagnostic doses for the improvement of radiation protection of patients. Two-dimensional dose distribution graphs were plotted, using RPL dosimeters, to observe the uniformity of the field emitted by conventional and microdose mammography equipments.

O13-03. Secondary radiation doses in paediatric phantoms for proton radiotherapy- EURADOS WG9 intercomparison

Željka Knežević (Ruđer Bošković Institute, Croatia)

Out of field doses of scattered radiation in proton radiotherapy are lower in comparison to different photon radiotherapy techniques for the same delivered tumour dose