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Title: Commissioning of the LaBr 3 (Ce) detector array at the National Superconducting Cyclotron Laboratory

Abstract

The timing and energy resolution properties of LaBr 3(Ce) scintillators are well suited for use in γγ fast-timing experiments. Here, using standard 60Co, 88Y, and 152Eu sources, the 16-element array of 1.5 inch by 1.5 inch right-cylindrical LaBr 3(Ce) detectors and the associated readout electronics at the National Superconducting Cyclotron Laboratory were commissioned by measuring the lifetimes of excited states and the angular correlations of γ rays emitted in cascade. Excited-state lifetimes in 152Sm and 152Gd were measured using the exponential slope of the decay and a method based on the centroids of time-difference spectra. Results for the lifetimes are consistent with the well-known literature values which cover a range from a few picoseconds to several nanoseconds. Finally, the γγ angular correlations for the 4 + → 2 + → 0 + cascade in 60Ni and the 3 - → 2 + → 0 + cascade in 88Sr were measured and shown to agree with GEANT4 simulations that take into account the expected angular correlations within the cascades as well as the geometry of the array.

Authors:
 [1];  [2];  [2];  [1];  [2]
  1. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy
  2. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
Publication Date:
Research Org.:
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1487039
Grant/Contract Number:  
NA0003180
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 916; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; LaBr3(Ce) scintillators; Fast-timing arrays; Lifetime measurements; Angular correlation measurements

Citation Formats

Longfellow, B., Bender, P. C., Belarge, J., Gade, A., and Weisshaar, D. Commissioning of the LaBr3 (Ce) detector array at the National Superconducting Cyclotron Laboratory. United States: N. p., 2018. Web. doi:10.1016/j.nima.2018.10.215.
Longfellow, B., Bender, P. C., Belarge, J., Gade, A., & Weisshaar, D. Commissioning of the LaBr3 (Ce) detector array at the National Superconducting Cyclotron Laboratory. United States. doi:10.1016/j.nima.2018.10.215.
Longfellow, B., Bender, P. C., Belarge, J., Gade, A., and Weisshaar, D. Sat . "Commissioning of the LaBr3 (Ce) detector array at the National Superconducting Cyclotron Laboratory". United States. doi:10.1016/j.nima.2018.10.215.
@article{osti_1487039,
title = {Commissioning of the LaBr3 (Ce) detector array at the National Superconducting Cyclotron Laboratory},
author = {Longfellow, B. and Bender, P. C. and Belarge, J. and Gade, A. and Weisshaar, D.},
abstractNote = {The timing and energy resolution properties of LaBr3(Ce) scintillators are well suited for use in γγ fast-timing experiments. Here, using standard 60Co, 88Y, and 152Eu sources, the 16-element array of 1.5 inch by 1.5 inch right-cylindrical LaBr3(Ce) detectors and the associated readout electronics at the National Superconducting Cyclotron Laboratory were commissioned by measuring the lifetimes of excited states and the angular correlations of γ rays emitted in cascade. Excited-state lifetimes in 152Sm and 152Gd were measured using the exponential slope of the decay and a method based on the centroids of time-difference spectra. Results for the lifetimes are consistent with the well-known literature values which cover a range from a few picoseconds to several nanoseconds. Finally, the γγ angular correlations for the 4+ → 2+ → 0+ cascade in 60Ni and the 3- → 2+ → 0+ cascade in 88Sr were measured and shown to agree with GEANT4 simulations that take into account the expected angular correlations within the cascades as well as the geometry of the array.},
doi = {10.1016/j.nima.2018.10.215},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
issn = {0168-9002},
number = C,
volume = 916,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 3, 2019
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