NDLI: ISOCS characterization of sodium iodide detectors for gamma-ray spectrometry

Content Provider	IEEE Xplore Digital Library
Author	Philips, S.A. Bronson, F. Venkataraman, R. Young, B.M.
Copyright Year	2004
Description	Author affiliation: Canberra Ind., Inc., Meriden, CT, USA (Philips, S.A.; Bronson, F.; Venkataraman, R.; Young, B.M.)
Abstract	Activity measurements require knowledge of the detector efficiency for the specific measurement geometry. Often it is not possible to perform a source-based efficiency calibration for the geometry of interest. In such cases the calculation of a response function or a Monte Carlo simulation for the detector may be used. Such methods can be time prohibitive, however, particularly in the case of measurement situations requiring a variety of counting geometries. The ISOCS methodology provides a pre-existing detector response which already contains the Monte Carlo calculated detector efficiencies for points in all spatial directions over a wide range of energies. The efficiency for a particular counting geometry can then be calculated very rapidly for a variety of source distributions and measurement geometries. The ISOCS software was traditionally limited to use with germanium (Ge) detectors, but recently has been extended to use with sodium iodide (NaI) detectors as well. This work presents the results of using a Monte Carlo simulation to characterize the efficiency response of 3"/spl times/3" and 2"/spl times/2" NaI detectors at several energies. The results from the ISOCS calculation were compared with measurements demonstrating the level of agreement for point and distributed sources. In addition the difficulties encountered in using a multi-line spectrum to determine the accuracy of the mathematical efficiency calibration were studied and these results are presented as well.
Starting Page	211
Ending Page	215
File Size	967764
Page Count	5
File Format	PDF
ISBN	0780387007
ISSN	10823654
e-ISBN	0780387015
DOI	10.1109/NSSMIC.2004.1462183
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-16
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gamma ray detection Gamma ray detectors Spectroscopy Geometry Calibration Monte Carlo methods Telephony Particle measurements Time measurement Solid modeling
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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