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Title: Isotopic response with small scintillator based gamma-ray spectrometers

Abstract

The intrinsic background of a gamma ray spectrometer is significantly reduced by surrounding the scintillator with a second scintillator. This second (external) scintillator surrounds the first scintillator and has an opening of approximately the same diameter as the smaller central scintillator in the forward direction. The second scintillator is selected to have a higher atomic number, and thus has a larger probability for a Compton scattering interaction than within the inner region. Scattering events that are essentially simultaneous in coincidence to the first and second scintillators, from an electronics perspective, are precluded electronically from the data stream. Thus, only gamma-rays that are wholly contained in the smaller central scintillator are used for analytic purposes.

Inventors:
 [1];  [2];  [3]
  1. Sparks, NV
  2. Lafayette, CA
  3. Oakland, CA
Issue Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1034627
Patent Number(s):
8101919
Application Number:
12/100,254
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Madden, Norman W, Goulding, Frederick S, and Asztalos, Stephen J. Isotopic response with small scintillator based gamma-ray spectrometers. United States: N. p., 2012. Web.
Madden, Norman W, Goulding, Frederick S, & Asztalos, Stephen J. Isotopic response with small scintillator based gamma-ray spectrometers. United States.
Madden, Norman W, Goulding, Frederick S, and Asztalos, Stephen J. Tue . "Isotopic response with small scintillator based gamma-ray spectrometers". United States. https://www.osti.gov/servlets/purl/1034627.
@article{osti_1034627,
title = {Isotopic response with small scintillator based gamma-ray spectrometers},
author = {Madden, Norman W and Goulding, Frederick S and Asztalos, Stephen J},
abstractNote = {The intrinsic background of a gamma ray spectrometer is significantly reduced by surrounding the scintillator with a second scintillator. This second (external) scintillator surrounds the first scintillator and has an opening of approximately the same diameter as the smaller central scintillator in the forward direction. The second scintillator is selected to have a higher atomic number, and thus has a larger probability for a Compton scattering interaction than within the inner region. Scattering events that are essentially simultaneous in coincidence to the first and second scintillators, from an electronics perspective, are precluded electronically from the data stream. Thus, only gamma-rays that are wholly contained in the smaller central scintillator are used for analytic purposes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {1}
}

Works referenced in this record:

The X-Ray/Gamma-Ray Spectrometer on the Near Earth Asteroid Rendezvous Mission
book, January 1997