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Title: Neutron – Gamma Scintillation Detector for Emergency Response

Authors:
 [1]
  1. Radiation Monitoring Devices, Inc., Watertown, MA (United States)
Publication Date:
Research Org.:
Radiation Monitoring Devices, Inc., Watertown, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1351081
Report Number(s):
DOE-RMDFR-11374
RMD.C1527
DOE Contract Number:
SC0011374
Type / Phase:
SBIR
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 61 RADIATION PROTECTION AND DOSIMETRY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Scintillator; neutron detection; special nuclear materials; high resolution gamma ray spectroscopy

Citation Formats

Gueorguiev, Andrey. Neutron – Gamma Scintillation Detector for Emergency Response. United States: N. p., 2017. Web.
Gueorguiev, Andrey. Neutron – Gamma Scintillation Detector for Emergency Response. United States.
Gueorguiev, Andrey. Wed . "Neutron – Gamma Scintillation Detector for Emergency Response". United States. doi:.
@article{osti_1351081,
title = {Neutron – Gamma Scintillation Detector for Emergency Response},
author = {Gueorguiev, Andrey},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Apr 12 00:00:00 EDT 2017},
month = {Wed Apr 12 00:00:00 EDT 2017}
}

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  • As recent world events show, criminal and terrorist access to nuclear materials is a growing national concern. The national laboratories have developed quantitative models to simulate the response of detection equipment when looking for lost or stolen nuclear material. SYNTH, a code written to synthesize typical gamma-ray spectroscopy experiments, and QUEST, a model to Quantify Uncertain Emergency Search Techniques, calculate the response functions of gamma-ray detectors for arbitrary source types and shielding configurations. In addition, QUEST provides an interactive, three-dimensional user interface supporting the virtual quest for nuclear materials, making possible quantitative comparisons of various sensor technologies and inspection methodologies.more » The probability of detecting a radioactive source during an inspection is a function of many different variables, including source type, structure geometry (including shielding), inspection dynamics (path and speed), detector (type, size, and resolution), and analysis algorithms. The authors present the results of their study comparing the synthetic Sodium Iodide (NaI) and Germanium (Ge) detector responses generated by both SYNTH and QUEST with those generated by real detectors deployed in the field. Quantitative models, such as the ones presented here, are important since they, (1) allow inspection teams to maximize the probability of finding materials of interest, (2) aid in the development of new instruments and detection techniques, and (3) support other diverse applications including environmental monitoring, nuclear facilities inspections, and radiation safety responder training.« less
  • The gamma-ray response matrix is reported for a 5-cm NE-214 organic liquid scintallation detector. Gamma-ray response functions were determined by Monte-Carlo calculations of the pulse-height spectra. The calculational method was thoroughly tested by comparisons with measured results from several laboratory gamma-ray sources. The response matrix generated from these calculations is 186 x 93, covering a pulse-height range from 0.10 to 9.40 light units and an energy range from 0.22 to 11.99 MeV. The response matrix was tested by unfolding a variety of measured gamma-ray spectra. The detector efficiency is also presented. (GRA)