Abstract：
:The neural network method has been used for the unfolding of neutron spectra in neutron spectrometry by Bonner spheres. A back propagation algorithm was used for training of neural networks. 4 mm x 4 mm bare LiI (Eu) and in a polyethylene sphere set: 2, 3, 4, 5, 6, 7, 8, 10, 12, 18 inch diameter have been used for unfolding of neutron spectra. Neural networks were trained by 199 sets of neutron spectra, which were subdivided into 6, 8, 10, 12, 15 and 20 energy bins and for each of them an appropriate neural network was designed and trained. The validation was performed by the 21 sets of neutron spectra. A neural network with 10 energy bins which had a mean value of error of 6% for dose equivalent estimation of spectra in the validation set showed the best results. The obtained results show that neural networks can be applied as an effective method for unfolding neutron spectra especially when the main target is neutron dosimetry.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Kardan MR,Setayeshi S,Koohi-Fayegh R,Ghiassi-Nejad Mdoi
10.1093/oxfordjournals.rpd.a006158keywords:
subject
Has Abstractpub_date
2003-01-01 00:00:00pages
27-30issue
1eissn
0144-8420issn
1742-3406journal_volume
104pub_type
杂志文章abstract：:Observer performance studies are time-consuming tasks, both for the participating observers and for the scientists collecting and analysing the data. A possible way to optimise such studies is to perform them in a completely digital environment. A software tool-ViewDEX (Viewer for Digital Evaluation of X-ray images)-h...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/nch550
更新日期：2005-01-01 00:00:00
abstract：:The use of high-energy linear electron accelerators (LINACs) for medical cancer treatments is widespread on an international scale. The associated bremsstrahlung X rays may produce neutrons as a result of subsequent photonuclear reactions with the different materials constituting the accelerator head. The generated ne...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncm075
更新日期：2007-01-01 00:00:00
abstract：:In the light of a growing awareness of the risks of inducing skin injuries as a consequence of fluoroscopically guided interventional procedures (FGIPs), this paper reports measurements of ESDs made during the period August 1998 to June 1999 on 137 patients undergoing cardiac, neurological and general FGIPs in the Sou...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/oxfordjournals.rpd.a006486
更新日期：2001-01-01 00:00:00
abstract：:To investigate the repair process of DNA damage induced by ionizing radiation in isolation from various types of cytoplasmic damage, we transfected X-irradiated enhanced green fluorescent protein (EGFP)-expressing plasmid DNA into non-irradiated mammalian cells using lipofectamine. The repair kinetics of the irradiate...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncy241
更新日期：2019-05-01 00:00:00
abstract：:Recent development of CaF2:Cu (the most sensitive material for radiation dosimetry) exhibiting a TL glow peak around 270 degrees C similar to that of CaF2:Mn has made it attractive to study the influence of heating rate on the response of CaF2 based TLDs. Influence of heating rate on CaF2:Mn (known to reduce the respo...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/oxfordjournals.rpd.a005870
更新日期：2002-01-01 00:00:00
abstract：:The SCK·CEN has carried out neutron field characterisation campaigns at several nuclear reactors. The main goal of these measurement campaigns was to evaluate the performance of different neutron personal dosemeters. To be able to evaluate the performance of neutron personal dosemeters in terms of Hp(10), knowledge of...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncu193
更新日期：2014-10-01 00:00:00
abstract：:A comparative study has been performed on the effects of high-dose-rate (DR) X-ray beams produced by a plasma focus device (PFMA-3), to exploit its potential medical applications (e.g. radiotherapy), and low-DR X-ray beams produced by a conventional source (XRT). Experiments have been performed at 0.5 and 2 Gy doses o...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncv163
更新日期：2015-09-01 00:00:00
abstract：:Zircon contains small amounts of uranium, thorium and radium in its crystalline structure. The ceramic industry is one of the major consumers of zirconium compounds that are used as an ingredient at ∼10-20 % by weight in glaze. In this study, seven different ceramic factories have been investigated regarding the prese...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncq441
更新日期：2011-06-01 00:00:00
abstract：:In May 2000, the chairman of the European Radiation Dosimetry Group (EURADOS) invited a number of experts with experience of cosmic radiation dosimetry to form a working group (WG 5) on aircraft crew dosimetry. Three observers from the Article 31 Group of Experts as well as one observer from the Joint Aviation Authori...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncl029
更新日期：2006-01-01 00:00:00
abstract：:A Chinese head phantom (CHP) is constructed for evaluating the specific absorption rate (SAR) by the wireless transceivers. The dimensions of the head phantom are within 4 % difference compared with the 95th percentile data from the China's standard. The shell's thickness and the configuration of the pinna are the sam...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/nct254
更新日期：2014-03-01 00:00:00
abstract：:The Techa river region was highly contaminated due to radioactive releases from a nuclear production facility in the period from 1949 to 1956. The inhabitants of the upper Techa river settlements received significant doses of external radiation. The majority of the houses in the upper Techa river villages were demolis...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/oxfordjournals.rpd.a005972
更新日期：2002-01-01 00:00:00
abstract：:CaSO4:Dy is a reliable high-sensitive themoluminescent phosphor useful for low-level and high-level radiation measurements as it exhibits fading free linear dose response with a single glow peak at ~230°C in these dose regions. For large-scale radiation protection dosimetry service, it is embedded in Teflon matrix wit...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章,评审
doi：10.1093/rpd/ncx287
更新日期：2018-10-01 00:00:00
abstract：:In Austria a comprehensive study on radiation exposure in waterworks was conducted. The aim of this study was to evaluate the risks for the affected employees. On the basis of geographical, geological and hydrological aspects, 21 waterworks were selected. A total of 85 passive short-term measurements and measurements ...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncu067
更新日期：2014-07-01 00:00:00
abstract：:A new quasi-monoenergetic neutron beam facility has been constructed at The Svedberg Laboratory (TSL) in Uppsala, Sweden. Key features include a neutron energy range of 11-175 MeV, high fluxes, user flux control, flexible neutron field size and shape, and spacious and easily accessible user area. The first results of ...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncm006
更新日期：2007-01-01 00:00:00
abstract：:A Monte Carlo based computational procedure for determining organ doses and effective doses has been described for two procedures used in newly developed image-guided radiation treatment: kilovoltage cone-beam computed tomography (kV CBCT) and mega-voltage computed tomography (MV CBCT). A whole-body patient computatio...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncn200
更新日期：2008-01-01 00:00:00
abstract：:The main dosimetric properties are reported of a new perovskite, LiMgF3, doped with Ce, Er and Dy impurities. An annealing temperature of 400 degrees C for one hour is necessary to erase any previous signal and to stabilise its sensitivity. A readout up to 450 degrees C gives the same result. The glow curve structure ...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/oxfordjournals.rpd.a005858
更新日期：2002-01-01 00:00:00
abstract：:The influence of 10 MeV high-current electron beams accelerated by the M-30 microtron on the luminescent properties of the α-Al₂O₃, Al₂O₃:Nb and Al₂O₃:Fe crystals has been studied. The effect of the long-term phosphorescence at room temperature has been found that can be used to monitor electron and gamma accelerator ...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncu213
更新日期：2014-11-01 00:00:00
abstract：:Shin Kori unit 3 of Korea Hydro and Nuclear Power Co. is the pressurized water reactor of advanced power reactor 1400 (APR1400) in the Republic of Korea. A hypothetical accident was assumed for Shin Kori unit 3 to perform the time-dependent dose calculations along with the release rates of radionuclides to the environ...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncaa105
更新日期：2020-09-16 00:00:00
abstract：:Optically stimulated luminescence (OSL) 'dot' dosemeters (manufactured by Landauer®) are reported to have a high degree of environmental stability, high level of sensitivity and provide wide range of dose measuring capabilities from 0.05 mGy to 100 Gy. The optical read out method is fast and relatively simple and perm...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncq289
更新日期：2011-01-01 00:00:00
abstract：:To assess occupational exposure to electromagnetic fields, 11 microwave (MW), 4 short-wave diathermy and 15 magneto therapy devices were analysed in eight physiotherapy departments. Measurements taken at consoles and environmental mapping showed values above European Directive 2004/40/EC and ACGIH exposure limits at a...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncm309
更新日期：2008-01-01 00:00:00
abstract：:Major contaminants from venting and hydrogen explosions at the Fukushima Daiichi nuclear reactors between 12 and 15 March 2011 were transported northwestward and deposited on soil and plants via precipitation. Surface soils and plant leaves were sampled at 64 sites in the Fukushima Prefecture. The highest concentratio...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncs222
更新日期：2012-11-01 00:00:00
abstract：:Radiation protection (RP) in the use of medical cyclotrons involves many aspects both in the routine use and for the decommissioning of a site. Guidelines for site planning and installation, as well as for RP assessment, are given in international documents; however, the latter typically offer analytic methods of calc...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncw302
更新日期：2017-04-01 00:00:00
abstract：:In order to provide reference fields for the ionising radiation, PTB operates the ion accelerator facility. Referring to high energy photons, reference fields according to International Organization for Standardization 4037 series are produced. The neutron component of the 6-7 MeV photon field (R-F), which is produced...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncp101
更新日期：2009-07-01 00:00:00
abstract：:There are several occurrences of thermal waters in the south-eastern part of Serbia, which are originating from igneous and metamorphic rocks. These waters are mainly used in balneology, but some of them are used for drinking purposes and in water supply to heat buildings, for greenhouses and to irrigate land. In this...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncu094
更新日期：2014-07-01 00:00:00
abstract：:Differences and similarities between LiF-based LiF:Mg,Ti and LiF:Mg,Cu,P are discussed, with respect to their dosimetric properties--sensitivity, non-linearity of dose response and heavy charged particle efficiency, as related to the concentration and the individual role of the Mg, Ti, Cu and P dopants. To study furth...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/oxfordjournals.rpd.a005847
更新日期：2002-01-01 00:00:00
abstract：:Proton beams (62 Mev) are used by the Laboratori Nazionali del Sud of the Italian Institute of Nuclear Physics to treat eye melanoma tumours at the therapeutic facility called CATANA. A cylindrical slim tissue-equivalent proportional counter (TEPC) of 2.7 mm external diameter has been used to compare the radiation qua...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/nch111
更新日期：2004-01-01 00:00:00
abstract：:Measurements of (239+240)Pu and (238)Pu were carried out on marine biota as well as on sediments from the fringing reefs area extending towards north and south (Flamingo Bay) of PortSudan harbour. The analyses were performed using radiochemical separation and alpha spectrometry. The range of the activity concentration...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncn193
更新日期：2008-01-01 00:00:00
abstract：:The evaluation of exposure to extremely low-frequency (ELF) magnetic fields using broadband measurement techniques gives satisfactory results when the field has essentially a single frequency. Nevertheless, magnetic fields are in most cases distorted by harmonic components. This work analyses the harmonic components o...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncu175
更新日期：2015-02-01 00:00:00
abstract：:The Christian ethical tradition introduces a number of key values into the clinical context. Moreover, although some denominational differences exist, these are essentially differences of emphasis rather than of substance. Among the central values which the Christian tradition promotes are: the dignity of the person, ...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncp044
更新日期：2009-07-01 00:00:00
abstract：:The results of experimental studies performed in a radiotherapy (12)C ion beam with a nominal energy of 500 MeV/amu and in (16)O and (56)Fe ion beams with a nominal energy of 1 GeV/amu have been described. Linear energy transfer (LET) spectra have been established by means of an LET spectrometer based on a chemically ...
journal_title：Radiation protection dosimetry
pub_type： 杂志文章
doi：10.1093/rpd/ncm133
更新日期：2007-01-01 00:00:00
