Portable spectroscopic fast neutron probe and 3He detector dead-time measurements

T. Akyurek*, L. P. Tucker, X. Liu, S. Usman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

This paper presents dead-time calculations for the Portable Spectroscopic Fast Neutron Probe (N-Probe) using a combination of the attenuation law, MCNP (Monte Carlo N-particle Code) simulations and the assumption of ideal paralyzing and non-paralyzing dead-time models. The N-Probe contains an NE-213 liquid scintillator detector and a spherical 3He detector. For the fast neutron probe, non-paralyzing dead-time values were higher than paralyzing dead-time values, as expected. Paralyzing dead-time was calculated to be 37.6 μs and non-paralyzing dead-time was calculated to be 43.7 μs for the N-Probe liquid scintillator detector. Dead-time value for Canberra 3He neutron detector (0.5NH1/1K) was also estimated using a combination of subcritical assembly measurements and MCNP simulations. The paralyzing dead-time was estimated to be 14.5 μs, and the non-paralyzing dead-time was estimated to be 16.4 μs for 3He gas filled detector. These results are consistent with the dead-time values reported for helium detectors.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalProgress in Nuclear Energy
Volume92
DOIs
Publication statusPublished - 1 Sept 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd

Keywords

  • Attenuation law
  • Dead-time calculations
  • MCNP simulations

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