TY - JOUR AB - Smart chip cards are a promising material in retrospective dosimetry due to their high collectability with low replacement cost. In this study, dose reconstruction using OSL at elevated temperatures for various chip cards was investigated. The approximate spectral emission of the chip cards was determined through a comparison of radiation-induced and intrinsic background TL signals using different detection filters. In the OSL decay curve, a fast component (0.0–0.4 s) was integrated to avoid high intrinsic background signals. To minimize sensitivity changes due to heat treatment, a protocol to measure OSL at 100 °C was developed and the data were compared with those from a similar protocol for OSL measured at room temperature. In the 0.1 - 5 Gy range, linear and power functions were fitted for room temperature and 100 °C OSL protocols, respectively. The minimum detectable dose was evaluated immediately after exposure, with values of 25 mGy for room temperature and 240 mGy for 100 °C OSL being determined. Signal fading was measured up to 30 days after irradiation for the investigated protocols. A dose recovery test was made 10 days after irradiation using various chip cards, and the 100 °C OSL protocol produced more reliable results than the room temperature OSL protocol. As a result, the study emphasizes the necessity of further investigation of OSL at high temperatures using chip cards. AU - Kim, H.* AU - Woda, C. AU - Discher, M.* C1 - 69845 C2 - 55277 CY - The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1gb, England TI - OSL at elevated temperature of smart chip cards for retrospective dosimetry. JO - Radiat. Phys. Chem. VL - 217 PB - Pergamon-elsevier Science Ltd PY - 2024 SN - 0969-806X ER - TY - JOUR AB - Neutrons of secondary cosmic radiation (CR) are produced when primary cosmic radiation interacts with the nuclei in the Earth's atmosphere. The secondary neutron spectra in the atmosphere do not include many thermal and epithermal neutrons at energies below several eV. In contrast, close to the Earth's surface many more of those neutrons are present, due to albedo neutrons backscattered from the ground. The number of albedo neutrons is mainly determined by the environment, i.e. the material in the environment (characteristics of the underground and the environment (building, topology of landscape)). If the environment (buildings, underground) is constant with time then the variation of the albedo neutron fluence is dependent on the soil moisture and snow cover.To investigate snow cover effect in detail, in June 2016 and September 2018 two measurement campaigns were carried out at the High Altitude Research Station Jungfraujoch, Switzerland. During these campaigns the energy distributions of secondary CR neutrons were measured by means of a mobile extended range Bonner sphere spectrometer (ERBSS) at two different positions with different environmental conditions: under the cupola of the astronomical observatory in the Sphinx building at an altitude of 3585 m a.s.l., and below the shelter roof of the research station at 3466 m a.s.l.In addition, since 2004 the energy spectra of neutrons from secondary CR have been continuously measured at the Environmental Research Station (UFS Schneefernerhaus; 2650 m a.s.l.) close to the summit of the Zugspitze mountain, Germany. To measure the neutron spectra in the energy range from a few meV up to several GeV, a stationary ERBSS has been used.The chosen measurement positions allow quantification of environmental conditions which affect the neutron spectral distribution in the whole neutron energy range up to several GeV. With this spectral information, it is also possible to derive detailed information about the neutron ambient dose equivalent (H*(10)) at these altitudes and geomagnetic latitudes.The ERBSS measurements at Jungfraujoch presented here show that snowpack in the surrounding area does not affect the fluence rate of secondary neutrons significantly. However, the influence of topography of the chosen measurement locations on secondary CR neutrons was observed. AU - Mares, V. AU - Brall, T. AU - Bütikofer, R.* AU - Rühm, W. C1 - 57355 C2 - 47732 CY - The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1gb, England TI - Influence of environmental parameters on secondary cosmic ray neutrons at high-altitude research stations at Jungfraujoch, Switzerland, and Zugspitze, Germany. JO - Radiat. Phys. Chem. VL - 168 PB - Pergamon-elsevier Science Ltd PY - 2020 SN - 0969-806X ER - TY - JOUR AB - The European Radiation Dosimetry Group (EURADOS) is a network of organizations and scientists promoting research and development in the dosimetry of ionizing radiation, contributing to harmonization in dosimetry practice across Europe, and offering education and training in areas relevant for dosimetry. As a registered non-profit association under German law, EURADOS is currently running eight active working groups (WGs): WG2 on "Harmonization of Individual Monitoring", WG3 on "Environmental Dosimetry", WG6 on "Computational Dosimetry", WG7 on "Internal Dosimetry", WG9 on "Dosimetry in Radiotherapy", WG10 on "Retrospective Dosimetry", WG11 on "Dosimetry in High-Energy Radiation Fields", and WG12 on "Dosimetry in Medical Imaging". This paper presents recent scientific results obtained within these working groups, and additionally highlights the role of EURADOS as an organization which contributes to the development of a systematic strategy of radiation protection research in Europe. AU - Rühm, W. AU - Ainsbury, E.* AU - Breustedt, B.* AU - Caresana, M.* AU - Gilvin, P.* AU - Knežević, Z.* AU - Rabus, H.* AU - Stolarczyk, L.* AU - Vargas, A.* AU - Bottollier-Depois, J.F.* AU - Harrison, R.* AU - López, M.A.* AU - Stadtmann, H.* AU - Tanner, R.* AU - Vanhavere, F.* AU - Woda, C. AU - Clairand, I.* AU - Fantuzzi, E.* AU - Fattibene, P.* AU - Hupe, O.* AU - Olko, P.* AU - Olšovcová, V.* AU - Schuhmacher, H.* AU - Alves, J.G.* AU - Miljanić, S.* C1 - 57249 C2 - 47643 CY - The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1gb, England TI - The European radiation dosimetry group - Review of recent scientific achievements. JO - Radiat. Phys. Chem. VL - 168 PB - Pergamon-elsevier Science Ltd PY - 2020 SN - 0969-806X ER - TY - JOUR AU - Vaz, P.* AU - Dewji, S.* AU - Lopes, I.* AU - Rühm, W. AU - Teles, P.* C1 - 59693 C2 - 48906 CY - The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1gb, England TI - Editorial. JO - Radiat. Phys. Chem. VL - 176 PB - Pergamon-elsevier Science Ltd PY - 2020 SN - 0969-806X ER - TY - JOUR AB - Measurement and interpretation of the distribution patterns of indoor Rn-220 concentration is important for inhalation dosimetry in occupational and residential areas. The shorter half-life of radioactive Rn-220 gas greatly affects its patterns resulting in non-homogeneity in the spatial concentration profile. In addition, the distribution profile also changes with variations in the ambient atmospheric parameters (ventilation rate, humidity etc.). The Computational fluid dynamics (CFD) technique has gained a lot of attention in recent times for the prediction and visualization of the distribution pattern of indoor Rn-222/Rn-220 concentration. This study aims to apply the CFD technique for studying the effect of variations in the ventilation rate on the distribution pattern of the Rn-220 concentration in a thoron test house. Experimentally measured Rn-220 flux from the surfaces of the experimental test house is used as input for the CFD simulations. Ventilation rate is varied from 0.1 h(-1) to 9.0 h(-1) and the simulated results of velocity and Rn-220 concentration profile for the entire test domain are interpreted. It is observed that the increase of ventilation rate leads to the flow induced turbulence enhancing the mixing of Rn-220 in indoor air. Results of this study demonstrate the inter-play of radionuclide half-life and turbulent mixing induced transportation. Inferences are discussed in order to improve the dosimetric deductions for indoor conditions. AU - Agarwal, T.K.* AU - Sahoo, B.K.* AU - Joshi, M.* AU - Mishra, R.* AU - Meisenberg, O. AU - Tschiersch, J. AU - Sapra, B.K.* C1 - 56018 C2 - 46740 CY - The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1gb, England SP - 82-89 TI - CFD simulations to study the effect of ventilation rate on Rn-220 concentration distribution in a test house. JO - Radiat. Phys. Chem. VL - 162 PB - Pergamon-elsevier Science Ltd PY - 2019 SN - 0969-806X ER - TY - JOUR AB - An intercomparison on in-vivo monitoring for determination of Am-241 in three skull phantoms was launched by EURADOS in 2011. The project focused on measurement and estimation of the activity of Am-241 in the human skull. Three human skull phantoms of different complexity were used. A Monte Carlo (MC) intercomparison exercise with the voxel representations of the physical phantom was launched additionally in September of 2012. The main goals of the action were (1) to investigate the different methodologies for developing MC calibrations that might arise from a complex radiological assessment and (2) to compare individual approaches of the participating laboratories in order to determine international guidance for best practice. The MC exercise consisted of three tasks with increasing difficulty, in order to test the extent of skills needed by the participating laboratory. The first task was to simulate a given detector and a well-defined semi-skull phantom. The second and third tasks presented in this paper-introduced more complex simulations with individual geometry and real detector modelling. The paper provides an overview of the participant's results, analyses of the observed issues concerning tasks two and three, and a general evaluation of the whole project. AU - Vrba, T.* AU - Broggio, D.* AU - Caldeira, M.* AU - Capello, K.* AU - Fantínová, K.* AU - Franck, D.* AU - Gómez-Ros, J.M.* AU - Hunt, J.* AU - Kinase, S.* AU - Leone, D.* AU - Lombardo, P.A.* AU - Manohari, M.* AU - Marzocchi, O.* AU - Moraleda, M.* AU - Nogueira, P. AU - Ośko, J.* AU - Arron, S.* AU - Suhl, S.* AU - Takahashi, M.* AU - Teles, P.* AU - Tremblay, M.* AU - Tymińska, K.* AU - Lopez, M.A.* AU - Tanner, R.* C1 - 44967 C2 - 37122 CY - Oxford SP - 59-71 TI - EURADOS intercomparison exercise on MC modelling for the in-vivo monitoring of AM-241 in skull phantoms (Part II and III). JO - Radiat. Phys. Chem. VL - 113 PB - Pergamon-elsevier Science Ltd PY - 2015 SN - 0969-806X ER - TY - JOUR AB - An intercomparison on in-vivo monitoring for determination of 241Am in three skull phantoms was launched by EURADOS in 2011. The project focused on the measurement and estimation of 241Am activity in the human skull. Three human skull phantoms of different complexity were used. A Monte Carlo (MC) exercise with the voxel representations of the real phantoms was also launched in September 2012. The main goals of the project were to investigate the use of MC techniques for efficiency calibrations for body monitoring systems for a special calibration exercise and compare the approaches of participating laboratories. The full MC exercise consisted of three tasks with increasing difficulty, to test the extent of the skills of each participating laboratory. The first task in this intercomparison was to simulate a specified detector and a well defined semi-skull phantom. All parameters of the simulation, including photon yield, material property and geometry were fixed. This paper provides an overview of the participants' results and analyses of the issues presented by this first task. The majority of the responses did not need any correction and the number of incorrect results was less than in a previous exercise of a similar kind. Overall knowledge in this research area utilising MC techniques appears to have improved and the repetition of the intercomparison exercise has positively affected the skills of the participating laboratories. AU - Vrba, T.* AU - Nogueira, P. AU - Broggio, D.* AU - Caldeira, M.* AU - Capello, K.* AU - Fantínová, K.* AU - Figueira, C.* AU - Hunt, J.* AU - Leone, D.* AU - Murugan, M.* AU - Marzocchi, O.* AU - Moraleda, M.* AU - Shutt, A.L.* AU - Suh, S.* AU - Takahashi, M.* AU - Tymińska, K.* AU - Antonia Lopez, M.* AU - Tanner, R.* C1 - 30739 C2 - 33805 CY - Oxford SP - 332-338 TI - EURADOS intercomparison exercise on MC modeling for the in-vivo monitoring of Am-241 in skull phantoms (Part I). JO - Radiat. Phys. Chem. VL - 104 PB - Pergamon-elsevier Science Ltd PY - 2014 SN - 0969-806X ER - TY - JOUR AU - Friedland, W. AU - Dingfelder, M.* AU - Jacob, P. AU - Paretzke, H.G. C1 - 1123 C2 - 22525 SP - 279-286 TI - Calculated DNA double-strand break and fragmentation yields after irradiation with He ions. JO - Radiat. Phys. Chem. VL - 72 PY - 2005 SN - 0969-806X ER - TY - JOUR AB - Using the pulse radiolysis technique, SO.- 3 was produced in aqueous solution by the reaction of SO2- 3 with either .OH or the (pseudo-) halide radicals N. 3, Br.- 3, and (SCN).- 2; for the latter reactions rate constants were measured. The reaction of SO.- 3 with linoleic, linolenic, and arachidonic acids was monitored using the strong absorption of the pentadienyl radical, one possible primary reaction product. In micellar systems no detectable reaction took place, however, monomeric fatty acids were observed to react with SO.- 3. Lower limits of the rate constants for SO.- 3 attack derived from the data are 1 × 105, 8 × 105, and 1.3 × 106 (dm3 mol-1 s-1) for linoleate, linolenate, and arachidonate, respectively. AU - Erben-Russ, M. AU - Bors, W. AU - Winter, R. AU - Saran, M. C1 - 42585 C2 - 36439 SP - 419-424 TI - The reaction of sulfite anion radical (SO.- 3) with polyunsaturated fatty acids. JO - Radiat. Phys. Chem. VL - 27 IS - 6 PY - 1986 SN - 0969-806X ER - TY - JOUR AU - Regulla, D.F. AU - Deffner, U. C1 - 41300 C2 - 38325 SP - 305-309 TI - A system of transfer dosimetry in radiation processing. JO - Radiat. Phys. Chem. VL - 22 IS - 3-5 PY - 1983 SN - 0969-806X ER -