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Whole-body detector calibrating with a modular phantom

Abstract

Human body models (phantoms) of various size and weight are produced in order to calibrate gamma spectrometers for accurate activity measurement. The phantoms are built of separate modules with mass of 0.5 kg and size 20 x 14 x 2 cm. There are modules with standard Eu-152 and Am-241 radioactivity designed for homogenous radioactivity imitating and critical organs moulding, as well as `zero` -phantom modules without activity imitating a standard human body. Human organs are modelled by 11 x 9 x 0.5 cm modules with 0.16 kg mass. The phantoms have been used to obtain calibration curves and absolute efficiencies for selected energies of radionuclides expected to be found in the Kozloduy NPP staff. It is shown that the efficiency depends not only on the mass but on the geometric size of the measured object. Scanning of phantoms has been carried out and a profile of activity obtained. The profile consists of an abrupt rising of the sum of pulses (measuring time - 20 s) when the detector passes from neck to chest, a plateau when it moves over the head or the trunk and gradual decrease over the legs. Profiles of activity in organs are best obtained with a  More>>
Authors:
Minev, L; Boshkova, T; Uzunov, P [1] 
  1. Sofia Univ. (Bulgaria). Fizicheski Fakultet
Publication Date:
Dec 31, 1995
Product Type:
Conference
Report Number:
INIS-BG-0013; CONF-9410364-
Reference Number:
SCA: 440102; PA: AIX-28:034732; EDB-97:062678; SN: 97001775234
Resource Relation:
Conference: 1. scientific and technical conference on nuclear safety conference dedicated to NPP Kozloduy, Kozloduy (Bulgaria), 25-26 Oct 1994; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of a scientific-technical conference dedicated to the 20-th anniversary of Kozloduy NPP with international participation; PB: 442 p.
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; WHOLE-BODY COUNTERS; PHANTOMS; BODY; CALIBRATION; CALIBRATION STANDARDS; GAMMA SPECTROMETERS; PERSONNEL MONITORING; RADIATION MONITORING; RADIOACTIVITY; TISSUE-EQUIVALENT MATERIALS
OSTI ID:
463266
Country of Origin:
Bulgaria
Language:
English
Other Identifying Numbers:
Other: ON: DE97621621; TRN: BG9700057034732
Availability:
INIS; OSTI as DE97621621
Submitting Site:
INIS
Size:
pp. 407-414
Announcement Date:

Citation Formats

Minev, L, Boshkova, T, and Uzunov, P. Whole-body detector calibrating with a modular phantom. Bulgaria: N. p., 1995. Web.
Minev, L, Boshkova, T, & Uzunov, P. Whole-body detector calibrating with a modular phantom. Bulgaria.
Minev, L, Boshkova, T, and Uzunov, P. 1995. "Whole-body detector calibrating with a modular phantom." Bulgaria.
@misc{etde_463266,
title = {Whole-body detector calibrating with a modular phantom}
author = {Minev, L, Boshkova, T, and Uzunov, P}
abstractNote = {Human body models (phantoms) of various size and weight are produced in order to calibrate gamma spectrometers for accurate activity measurement. The phantoms are built of separate modules with mass of 0.5 kg and size 20 x 14 x 2 cm. There are modules with standard Eu-152 and Am-241 radioactivity designed for homogenous radioactivity imitating and critical organs moulding, as well as `zero` -phantom modules without activity imitating a standard human body. Human organs are modelled by 11 x 9 x 0.5 cm modules with 0.16 kg mass. The phantoms have been used to obtain calibration curves and absolute efficiencies for selected energies of radionuclides expected to be found in the Kozloduy NPP staff. It is shown that the efficiency depends not only on the mass but on the geometric size of the measured object. Scanning of phantoms has been carried out and a profile of activity obtained. The profile consists of an abrupt rising of the sum of pulses (measuring time - 20 s) when the detector passes from neck to chest, a plateau when it moves over the head or the trunk and gradual decrease over the legs. Profiles of activity in organs are best obtained with a lead collimator. 4 refs., 7 figs., 2 tabs.}
place = {Bulgaria}
year = {1995}
month = {Dec}
}