Abstract:
:Extensive data have been gathered in the past on the response of different detectors, based on the registration of neutron-induced fissions in bismuth, gold, tantalum and thorium by the spark-replica counter and the thin film breakdown counter. These detectors make it possible to exploit the excellent characteristics of the fission reactions for the measurements of high-energy neutrons. Most of the investigations have been carried out at the quasi-monoenergetic neutron beam facility at The Svedberg Laboratory-TSL of the Uppsala University in cooperation with the Khlopin Radium Institute (KRI). The responses of different fission detectors in the neutron energy range 35-180 MeV have been evaluated: a region where the predictive power of available nuclear reaction models and codes is not reliable yet. For neutron energy >200 MeV, the fission-detector responses have been derived from the data of the proton fission cross sections. By using the ratio of the responses of these detectors, a simple and accurate way to evaluate the spectrum hardness can be obtained, thus providing a tool to obtain spectral information needed for neutron dosimetry without the need to know the entire spectrum. Extensive data have been already obtained for the high-energy neutron spectrum from the CERN concrete facility. In the present paper, the measured values of the response ratios for different fissile detectors exposed at the CERN facility are compared with those calculated for the spectra from the same facility and from different altitudes in the atmosphere, respectively.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Tommasino L,Tripathy SPdoi
10.1093/rpd/nch168keywords:
subject
Has Abstractpub_date
2004-01-01 00:00:00pages
227-31issue
1-4eissn
0144-8420issn
1742-3406pii
110/1-4/227journal_volume
110pub_type
杂志文章abstract::The radioisotopic content of 17 samples of natural and manufactured building materials collected in Tunisia have been analysed by using gamma spectrometry. From the measured gamma ray spectra, activity concentrations are determined for (232)Th, (226)Ra, (235)U and (40)K. The total effective dose and the activity conce...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/nch489
更新日期:2005-01-01 00:00:00
abstract::Computed tomography dose index w and dose length product were recorded for the purpose of developing diagnostic reference levels (DRLs) for radiation dose optimisation. The study was conducted in three radiology departments with CT centres in Northern Nigeria. Data were collected from 54 consenting adult participants ...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章,多中心研究
doi:10.1093/rpd/ncv188
更新日期:2015-07-01 00:00:00
abstract::A monolithic silicon telescope, consisting of a DeltaE and an E stage-detector ( approximately 1.9 microm and 500 microm thick, respectively), was coupled to a polyethylene converter in order to investigate the feasibility of a solid state microdosimeter with respect to the field-funnelling effect. This work discusses...
journal_title:Radiation protection dosimetry
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journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncz136
更新日期:2019-12-31 00:00:00
abstract::Radon diffusion coefficient is a material parameter which is usually used in the radon mitigation measures design. There are different approaches used for radon diffusion coefficient measurement and assessment. The International comparison measurement which was jointly organised by National Radiation Protection Instit...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncr079
更新日期:2011-05-01 00:00:00
abstract::Two phantoms for a performance evaluation of cone-beam computed tomography (CBCT) were developed and their efficiency was tested. The first phantom, for low-contrast resolution, consisted of an acrylic circular plate with three 0.5-1.0 mm diameter rods. These rods enable the user to visually evaluate the limit of obse...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncy116
更新日期:2019-05-01 00:00:00
abstract::Soil 222Rn concentration, CO2 and CH4 flux measurements were conducted around the Jwalamukhi area of North-West Himalayas, India. During this study, around 37 soil gas points and flux measurements were taken with the aim to assure the suitability of this method in the study of fault zones. For this purpose, RAD 7 (Dur...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncw071
更新日期:2016-10-01 00:00:00
abstract::Within the framework of the EURADOS Working Group 11, a comparison of passive neutron dosemeters in high-energy neutron fields was organised in 2011. The aim of the exercise was to evaluate the response of poly-allyl-glycol-carbonate neutron dosemeters from various European dosimetry laboratories to high-energy neutro...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/nct275
更新日期:2014-10-01 00:00:00
abstract::Data on the daily urinary excretion of thorium (Th) was obtained from 15 non-exposed adult German subjects. A radiochemical neutron activation analysis method was developed and standardised especially for this purpose. The daily urinary excretion of 232Th was found to be in the range 1.9-14.9 microBq d(-1) with a mean...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/nch482
更新日期:2005-01-01 00:00:00
abstract::This article report the measurements on-board a small aircraft at the same altitude and around the same geographic coordinates. The measurements of Ambient Dose Equivalent Rate (H*(10)) were performed in several positions inside the aircraft, close and far from the pilot location and the discrimination between neutron...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncw384
更新日期:2017-11-01 00:00:00
abstract::The aim of the present work is to investigate the possibility of using the properties of the thermoluminescent emission (TL) of Brazilian natural topaz for dosimetric applications. Topaz is an aluminium fluorsilicate with general composition of Al2(SiO4)(F,OH)2 found with relative abundance in Brazil and in other part...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.rpd.a005902
更新日期:2002-01-01 00:00:00
abstract::In support of the effort to begin high-dose rate 252Cf brachytherapy treatments at Tufts-New England Medical Center, the shielding capabilities of a clinical accelerator vault against the neutron and photon emissions from a 1.124 mg 252Cf source were examined. Outside the clinical accelerator vault, the fast neutron d...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/nch473
更新日期:2005-01-01 00:00:00
abstract::The biokinetic and dosimetric model of the gastrointestinal (GI) tract applied in current documents of the International Commission on Radiological Protection (ICRP) was developed in the mid-1960s. The model was based on features of a reference adult male and was first used by the ICRP in Publication 30, Limits for In...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章,评审
doi:10.1093/rpd/ncl104
更新日期:2007-01-01 00:00:00
abstract::In this work, the MCNP4B code has been employed to calculate conversion coefficients from air kerma to the ambient dose equivalent, H*(10)/Ka, for monoenergetic photon energies from 10 keV to 50 MeV, assuming the kerma approximation. Also estimated are the H*(10)/Ka for photon beams produced by linear accelerators, su...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/nch351
更新日期:2004-01-01 00:00:00
abstract::This study identified occupational factors associated with radiation exposure in Korea. Survey data of 16 037 workers from 2016 to 2017, including lifestyle factors and occupational characteristics, were combined with the National Dose Registry. Higher average annual doses were observed in groups exhibiting health ris...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncaa019
更新日期:2020-07-07 00:00:00
abstract::Managing radiation injuries following a catastrophic event where large numbers of people may have been exposed to life-threatening doses of ionizing radiation relies on the availability of biodosimetry to assess whether individuals need to be triaged for care. Electron Paramagnetic Resonance (EPR) tooth dosimetry is a...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncw153
更新日期:2016-12-01 00:00:00
abstract::The aim of this work was to experimentally compare the contrast improvement factors (CIFs) of a newly developed software-based scatter correction to the CIFs achieved by an antiscatter grid. To this end, three aluminium discs were placed in the lung, the retrocardial and the abdominal areas of a thorax phantom, and di...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncv432
更新日期:2016-06-01 00:00:00
abstract::Digital breast tomosynthesis is a new three-dimensional (3D) breast-imaging modality that produces images of cross-sectional planes parallel to the detector plane from a limited number of X-ray projections over a limited angular range. Several technical and clinical parameters have not yet been completely optimised. S...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncq084
更新日期:2010-04-01 00:00:00
abstract::In this article, an approach to compute the dose conversion coefficients (DCCs) is described for the computational voxel phantom 'High-Definition Reference Korean-Man' (HDRK-Man) using artificial neural networks (ANN). For this purpose, the voxel phantom was implemented into the Monte Carlo (MC) transport toolkit GEAN...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncv436
更新日期:2016-12-01 00:00:00
abstract::UVA wavelengths (320-400 nm) have been implicated in recent studies to contribute to melanoma induction and skin photoaging in humans and damage to plants. The use of smartphones in UVA observations is a way to supplement measurements made by traditional radiometric and spectroradiometric technology. Although the smar...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncu344
更新日期:2015-12-01 00:00:00
abstract::Peak skin doses to patients undergoing interventional radiological procedures in a 3-year period were assessed to identify the most critical procedures and evaluate probability for occurrence of radiation-induced tissue injuries. Data of 7607 patients were reviewed, identifying those with cumulative air kerma at a ref...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncy119
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abstract::The objective of this article is to present initial occupational dose values using digital active personal dosimeters for medical staff during adult interventional cardiology procedures in a public hospital in Chile. Personal dose equivalent Hp(10) over the lead apron of physician, nurse and radiographer were measured...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncy057
更新日期:2018-12-01 00:00:00
abstract::Lignite burning is one of the sources of technologically enhanced exposure to humans from natural radionuclides. In the preliminary study, part of the survey, the activity concentrations of (226)Ra, (232)Th and (40)K in 112 samples of feed lignites from seven lignite-fired power plants in Western Anatolia (Seyitömer, ...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncq210
更新日期:2010-12-01 00:00:00
abstract::During the 7th European Conference on Protection Against Radon at Home and at Work held in the autumn of 2013 in Prague, the second intercomparison of measuring instruments for radon and its short-lived decay products and the first intercomparison of radon/thoron gas discriminative passive detectors in mix field of ra...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncu079
更新日期:2014-07-01 00:00:00
abstract::Virtual models of real phantoms used with Monte Carlo methods facilitate the calibration and other studies associated with whole-body and partial-body counting systems. In this investigation, a voxel model of an LLNL torso phantom, available physically in the in vivo laboratory at KIT, was created from computed tomogr...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncp030
更新日期:2009-02-01 00:00:00
abstract::New paradigms for parallel programming have been devised to simplify software development on multi-core processors and many-core graphical processing units (GPU). Despite their obvious benefits, the parallelisation of existing computer programs is not an easy task. In this work, the use of the Open Multiprocessing (Op...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncv430
更新日期:2016-06-01 00:00:00
abstract::Iodine thyroid blocking (ITB) suppresses the uptake of iodine to the thyroid and reduces internal doses after radioiodine intake; however, its disturbance of thyroid biokinetics causes considerable uncertainty in the use of dosimetric data intended for assessment of unblocked normal thyroid. To more accurately assess ...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/ncz139
更新日期:2019-12-31 00:00:00
abstract::A water-filled tissue equivalent phantom with a diameter of 35 cm was developed at the Institute for Biomedical Problems. Moscow. Russia. It contains four channels perpendicular to each other, where dosemeters can be exposed at different depths. Between May 1997 and February 1999 the phantom was installed at three dif...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/oxfordjournals.rpd.a005923
更新日期:2002-01-01 00:00:00
abstract::Some activities of EURADOS Working Group 9 (WG9) are presently funded by the European Commission (CONRAD project). The objective of WG9 is to promote and co-ordinate research activities for the assessment of occupational exposures to staff at workplaces in interventional radiology (IR) and nuclear medicine. For some o...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章,评审
doi:10.1093/rpd/ncn149
更新日期:2008-01-01 00:00:00
abstract::Because the doses received on-board aeroplanes are now monitored to fulfil legal requirements in some countries, including the European Community, the models to calculate doses received during solar events have left their purely academic status to become a part of operational systems as well. The present work consider...
journal_title:Radiation protection dosimetry
pub_type: 杂志文章
doi:10.1093/rpd/nci356
更新日期:2006-01-01 00:00:00