Document Detail


Response of ionization chamber based pocket dosimeter to beta radiation.
MedLine Citation:
PMID:  23978508     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Quantitative estimate of the response of ionization chamber based pocket dosimeters (DRDs) to various beta sources was performed. It has been established that the ionization chamber based pocket dosimeters do not respond to beta particles having energy (Emax)<1MeV and same was verified using (147)Pm, (85)Kr and (204)Tl beta sources. However, for beta particles having energy >1MeV, the DRDs exhibit measureable response and the values are ~8%, ~14% and ~27% per mSv for natural uranium, (90)Sr/(90)Y and (106)Ru/(106)Rh beta sources respectively. As the energy of the beta particles increases, the response also increases. The response of DRDs to beta particles having energy>1MeV arises due to the fact that the thickness of the chamber walls is less than the maximum range of beta particles. This may also be one of the reasons for disparity between doses measured with passive/legal dosimeters (TLDs) and DRDs in those situations in which radiation workers are exposed to mixed field of gamma photons and beta particles especially at uranium processing plants, nuclear (power and research) reactors, waste management facilities and fuel reprocessing plants etc. The paper provides the reason (technical) for disparity between the doses recorded by TLDs and DRDs in mixed field of photons and beta particles.
Authors:
Munish Kumar; Anil Gupta; S M Pradhan; A K Bakshi; M P Chougaonkar; D A R Babu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-8-7
Journal Detail:
Title:  Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine     Volume:  82C     ISSN:  1872-9800     ISO Abbreviation:  Appl Radiat Isot     Publication Date:  2013 Aug 
Date Detail:
Created Date:  2013-8-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9306253     Medline TA:  Appl Radiat Isot     Country:  -    
Other Details:
Languages:  ENG     Pagination:  130-132     Citation Subset:  -    
Copyright Information:
© 2013 Elsevier Ltd. All rights reserved.
Affiliation:
Radiological Physics and Advisory Division, Bhabha Atomic Research Centre (BARC), Mumbai 400085, India. Electronic address: munish_pms@rediffmail.com.
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