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Locating gamma radiation source by self collimating BGO detector system

Abstract

The need for airborne collimated gamma detector system to estimate the radiation released from a nuclear accident has been established. A BGO detector system has been developed as an array of separate seven cylindrical Bismuth Germanate scintillators, one central detector symmetrically surrounded by six detectors. In such an arrangement, each of the detectors reduced the exposure of other detectors in the array to a radiation incident from a possible specific spatial angle, around file array. This shielding property defined as `self-collimation`, differs the point source response function for each of the detectors. The BGO detector system has a high density and atomic number, and therefore provides efficient self-collimation. Using the response functions of the separate detectors enables locating point sources as well as the direction of a nuclear radioactive plume with satisfactory angular resolution, of about 10 degrees. The detector`s point source response, as function of the source direction, in a horizontal plane, has been predicted by analytical calculation, and was verified by Monte-Carlo simulation using the code EGS4. The detector`s response was tested in a laboratory-scale experiment for several gamma ray energies, and the experimental results validated the theoretical (analytical and Monte-Carlo) results. (authors).
Authors:
Orion, I; Pernick, A; Ilzycer, D; Zafrir, H; [1]  Shani, G [2] 
  1. Israel Atomic Energy Commission, Yavne (Israel). Soreq Nuclear Research Center
  2. Ben-Gurion Univ. of the Negev, Beersheba (Israel)
Publication Date:
Dec 01, 1996
Product Type:
Conference
Report Number:
INIS-mf-15507; CONF-961252-
Reference Number:
SCA: 440103; 540130; PA: AIX-28:023832; EDB-97:075150; SN: 97001788889
Resource Relation:
Conference: 19. conference of the Israel Nuclear Societies, Herzliya (Israel), 9-10 Dec 1996; Other Information: PBD: Dec 1996; Related Information: Is Part Of Program and book of abstracts; PB: 149 p.
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 54 ENVIRONMENTAL SCIENCES; BGO DETECTORS; CALIBRATION; AERIAL SURVEYING; COLLIMATORS; GAMMA SPECTRA; MONTE CARLO METHOD; POINT SOURCES; SPECTRA UNFOLDING
OSTI ID:
475985
Research Organizations:
Israel Nuclear Society, Yavne (Israel)
Country of Origin:
Israel
Language:
English
Other Identifying Numbers:
Other: ON: DE97616259; TRN: IL9606202023832
Availability:
INIS; OSTI as DE97616259
Submitting Site:
INIS
Size:
pp. 1-4
Announcement Date:

Citation Formats

Orion, I, Pernick, A, Ilzycer, D, Zafrir, H, and Shani, G. Locating gamma radiation source by self collimating BGO detector system. Israel: N. p., 1996. Web.
Orion, I, Pernick, A, Ilzycer, D, Zafrir, H, & Shani, G. Locating gamma radiation source by self collimating BGO detector system. Israel.
Orion, I, Pernick, A, Ilzycer, D, Zafrir, H, and Shani, G. 1996. "Locating gamma radiation source by self collimating BGO detector system." Israel.
@misc{etde_475985,
title = {Locating gamma radiation source by self collimating BGO detector system}
author = {Orion, I, Pernick, A, Ilzycer, D, Zafrir, H, and Shani, G}
abstractNote = {The need for airborne collimated gamma detector system to estimate the radiation released from a nuclear accident has been established. A BGO detector system has been developed as an array of separate seven cylindrical Bismuth Germanate scintillators, one central detector symmetrically surrounded by six detectors. In such an arrangement, each of the detectors reduced the exposure of other detectors in the array to a radiation incident from a possible specific spatial angle, around file array. This shielding property defined as `self-collimation`, differs the point source response function for each of the detectors. The BGO detector system has a high density and atomic number, and therefore provides efficient self-collimation. Using the response functions of the separate detectors enables locating point sources as well as the direction of a nuclear radioactive plume with satisfactory angular resolution, of about 10 degrees. The detector`s point source response, as function of the source direction, in a horizontal plane, has been predicted by analytical calculation, and was verified by Monte-Carlo simulation using the code EGS4. The detector`s response was tested in a laboratory-scale experiment for several gamma ray energies, and the experimental results validated the theoretical (analytical and Monte-Carlo) results. (authors).}
place = {Israel}
year = {1996}
month = {Dec}
}