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Title: Definition of energy-calibrated spectra for national reachback

Abstract

Accurate energy calibration is critical for the timeliness and accuracy of analysis results of spectra submitted to National Reachback, particularly for the detection of threat items. Many spectra submitted for analysis include either a calibration spectrum using 137Cs or no calibration spectrum at all. The single line provided by 137Cs is insufficient to adequately calibrate nonlinear spectra. A calibration source that provides several lines that are well-spaced, from the low energy cutoff to the full energy range of the detector, is needed for a satisfactory energy calibration. This paper defines the requirements of an energy calibration for the purposes of National Reachback, outlines a method to validate whether a given spectrum meets that definition, discusses general source considerations, and provides a specific operating procedure for calibrating the GR-135.

Authors:
 [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1204077
Report Number(s):
SAND2014-0686
498791
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Kunz, Christopher L., and Hertz, Kristin L. Definition of energy-calibrated spectra for national reachback. United States: N. p., 2014. Web. doi:10.2172/1204077.
Kunz, Christopher L., & Hertz, Kristin L. Definition of energy-calibrated spectra for national reachback. United States. doi:10.2172/1204077.
Kunz, Christopher L., and Hertz, Kristin L. Wed . "Definition of energy-calibrated spectra for national reachback". United States. doi:10.2172/1204077. https://www.osti.gov/servlets/purl/1204077.
@article{osti_1204077,
title = {Definition of energy-calibrated spectra for national reachback},
author = {Kunz, Christopher L. and Hertz, Kristin L.},
abstractNote = {Accurate energy calibration is critical for the timeliness and accuracy of analysis results of spectra submitted to National Reachback, particularly for the detection of threat items. Many spectra submitted for analysis include either a calibration spectrum using 137Cs or no calibration spectrum at all. The single line provided by 137Cs is insufficient to adequately calibrate nonlinear spectra. A calibration source that provides several lines that are well-spaced, from the low energy cutoff to the full energy range of the detector, is needed for a satisfactory energy calibration. This paper defines the requirements of an energy calibration for the purposes of National Reachback, outlines a method to validate whether a given spectrum meets that definition, discusses general source considerations, and provides a specific operating procedure for calibrating the GR-135.},
doi = {10.2172/1204077},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 2014},
month = {Wed Jan 01 00:00:00 EST 2014}
}

Technical Report:

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