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Title: C$$^{7}$$LYC: A New Scintillator for Fast Neutron Spectroscopy

Abstract

The scintillator Cs 2LiYCl 6 (CLYC) has emerged as a versatile detector for both gammas and neutrons, with excellent pulse shape discrimination. Originally developed as a thermal neutron counter, the discovery of its unexpected and unprecedented ~10% pulse height resolution for fast neutrons in the few MeV range has prompted studies to benchmark its use in low-energy nuclear science and applications. Since the typical long time-of-flight arms are not needed for achieving good energy resolution, geometrical efficiency can be enhanced by positioning the detectors much closer to the target. We have constructed a 16-element array of 1” × 1”7Li-enriched C 7LYC, to eliminate the dominant peak in the spectrum from thermal neutron capture on 6Li, leaving the energy region above 3 MeV with a clean baseline for fast neutron spectroscopy. We have also procured the first ever 3” × 3” C 7LYC crystal. Test experiments under way with C 7LYC include elastic and inelastic neutron scattering cross sections at Los Alamos with a pulsed white neutron source, efficiency measurements using mono-energetic neutron beams up to a few MeV at UMass Lowell, and fission neutron measurements with GRETINA and CHICO detector arrays at Argonne. Beta-delayed neutron spectroscopy experiments have also beenmore » initiated at the CARIBU and NSCL facilities, to evaluate C 7LYC as a possible candidate for auxiliary scintillator arrays for stopped beam physics at the next generation rare isotope accelerators.« less

Authors:
 [1]
  1. Univ. of Massachusetts, Lowell, MA (United States)
Publication Date:
Research Org.:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1610270
Grant/Contract Number:  
FG02-94ER40848; NA0001988; NA0002932
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Acta Physica Polonica. Series B
Additional Journal Information:
Journal Volume: 50; Journal Issue: 3; Journal ID: ISSN 0587-4254
Publisher:
Jagiellonian University
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Physics

Citation Formats

Chowdhury, P. C$^{7}$LYC: A New Scintillator for Fast Neutron Spectroscopy. United States: N. p., 2019. Web. doi:10.5506/aphyspolb.50.339.
Chowdhury, P. C$^{7}$LYC: A New Scintillator for Fast Neutron Spectroscopy. United States. doi:10.5506/aphyspolb.50.339.
Chowdhury, P. Tue . "C$^{7}$LYC: A New Scintillator for Fast Neutron Spectroscopy". United States. doi:10.5506/aphyspolb.50.339. https://www.osti.gov/servlets/purl/1610270.
@article{osti_1610270,
title = {C$^{7}$LYC: A New Scintillator for Fast Neutron Spectroscopy},
author = {Chowdhury, P.},
abstractNote = {The scintillator Cs2LiYCl6 (CLYC) has emerged as a versatile detector for both gammas and neutrons, with excellent pulse shape discrimination. Originally developed as a thermal neutron counter, the discovery of its unexpected and unprecedented ~10% pulse height resolution for fast neutrons in the few MeV range has prompted studies to benchmark its use in low-energy nuclear science and applications. Since the typical long time-of-flight arms are not needed for achieving good energy resolution, geometrical efficiency can be enhanced by positioning the detectors much closer to the target. We have constructed a 16-element array of 1” × 1”7Li-enriched C7LYC, to eliminate the dominant peak in the spectrum from thermal neutron capture on 6Li, leaving the energy region above 3 MeV with a clean baseline for fast neutron spectroscopy. We have also procured the first ever 3” × 3” C7LYC crystal. Test experiments under way with C7LYC include elastic and inelastic neutron scattering cross sections at Los Alamos with a pulsed white neutron source, efficiency measurements using mono-energetic neutron beams up to a few MeV at UMass Lowell, and fission neutron measurements with GRETINA and CHICO detector arrays at Argonne. Beta-delayed neutron spectroscopy experiments have also been initiated at the CARIBU and NSCL facilities, to evaluate C7LYC as a possible candidate for auxiliary scintillator arrays for stopped beam physics at the next generation rare isotope accelerators.},
doi = {10.5506/aphyspolb.50.339},
journal = {Acta Physica Polonica. Series B},
issn = {0587-4254},
number = 3,
volume = 50,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
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