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Title: Apparatus and method for detecting gamma radiation

A high efficiency radiation detector for measuring X-ray and gamma radiation from small-volume, low-activity liquid samples with an overall uncertainty better than 0.7% (one sigma SD). The radiation detector includes a hyperpure germanium well detector, a collimator, and a reference source. The well detector monitors gamma radiation emitted by the reference source and a radioactive isotope or isotopes in a sample source. The radiation from the reference source is collimated to avoid attenuation of reference source gamma radiation by the sample. Signals from the well detector are processed and stored, and the stored data is analyzed to determine the radioactive isotope(s) content of the sample. Minor self-attenuation corrections are calculated from chemical composition data.
Inventors:
 [1]
  1. (Martinez, GA)
Issue Date:
OSTI Identifier:
869648
Assignee:
United States of America as represented by United States (Wasington, DC) SRS
Patent Number(s):
US 5373163
Contract Number:
AC09-89SR18035
Research Org:
WESTINGHOUSE SAVANNAH RIVER CO
Country of Publication:
United States
Language:
English
Subject:
apparatus; method; detecting; gamma; radiation; efficiency; detector; measuring; x-ray; small-volume; low-activity; liquid; samples; overall; uncertainty; sigma; sd; hyperpure; germanium; collimator; reference; source; monitors; emitted; radioactive; isotope; isotopes; sample; collimated; avoid; attenuation; signals; processed; stored; data; analyzed; determine; content; minor; self-attenuation; corrections; calculated; chemical; composition; liquid sample; radioactive isotope; liquid samples; chemical composition; radiation detector; gamma radiation; radiation emitted; reference source; stored data; detecting gamma; /250/