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Title: Gamma-ray imaging with coaxial HPGe detector

We report on the first experimental demonstration of Compton imaging of gamma rays with a single coaxial high-purity germanium (HPGe) detector. This imaging capability is realized by two-dimensional segmentation of the outside contact in combination with digital pulse-shape analysis, which enables to image gamma rays in 4{pi} without employing a collimator. We are able to demonstrate the ability to image the 662keV gamma ray from a {sup 137}Cs source with preliminary event selection with an angular accuracy of 5 degree with an relative efficiency of 0.2%. In addition to the 4{pi} imaging capability, such a system is characterized by its excellent energy resolution and can be implemented in any size possible for Ge detectors to achieve high efficiency.
Authors:
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Publication Date:
OSTI Identifier:
940163
Report Number(s):
UCRL-JRNL-211944
TRN: US0806939
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Instrumentations and Methods in Physics Research - Section A, n/a, n/a, April 15, 2005, pp. 24
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 59 BASIC BIOLOGICAL SCIENCES; 22 GENERAL STUDIES OF NUCLEAR REACTORS; ACCURACY; EFFICIENCY; ENERGY RESOLUTION; GERMANIUM