DocumentCode :
898890
Title :
An Array of 12 Planar Germanium Detectors for in Situ Gamma Spectroscopy
Author :
Kordas, J.F. ; Sawyer, D.L. ; Kirby, J.A. ; Ewins, J.H.
Author_Institution :
Electronic Engineering Department and Environmental Sciences Division Lawrence Livermore National Laboratory P.O. Box 5507, Mail Stop L-524 Livermore, California 94550
Volume :
29
Issue :
1
fYear :
1982
Firstpage :
1014
Lastpage :
1017
Abstract :
There is a continuing need at the Nevada Test Site (NTS) for sensitive instruments that quantify surface concentrations of radionuclides. We have designed, fabricated, and field tested an array of 12 high-purity germanium planar detectors in a single cryostat. The detector system has a total surface area of 120 cm2 and internal shielding. The detectors are 0.8-cm thick and are individually encapsulated. This system was primarily designed for in situ detection of plutonium via the 241Am 60-keV gamma ray; however, it will also be used for in vivo lung counting and sample counting. We have fielded it at the NTS and found it to have a minimum detectable activity (MDA) for 241Am of about a factor of four lower than that of our four-detector system.
Keywords :
Calibration; Encapsulation; Gamma ray detection; Gamma ray detectors; Germanium; Laboratories; Sensor arrays; Soil; Spectroscopy; Testing;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.1982.4336005
Filename :
4336005
Link To Document :
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