A Detector System for In-Situ Spectrometric Analysis of 241Am and Pu in Soil

Author(s): J. A. Kirby ; L. R. Anspaugh ; P. L. Phelps ; G. A. Armantrout ; D. Sawyer
Sponsor(s): IEEE Nuclear and Plasma Sciences Society
Publisher: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 1 February 1976
Volume: 23
Page(s): 683 - 689
ISSN (Paper): 0018-9499
ISSN (Online): 1558-1578
DOI: 10.1109/TNS.1976.4328327



This system for quantitative analysis of Pu in soil via 241Am has four 2.5-mm high-purity Ge detectors of 33 cm2 total detecting surface area. These detectors are paralleled by gating circuitry to avoid the degradation of energy resolution associated with electronic output summing. In field tests the system was approximately three times as sensitive as a 70-cm3 Ge(Li) detector and approximately an order of magnitude more sensitive than the FIDLER system.