Neutron detection in a high-gamma field using solution-grown stilbene
Abstract
We present that a solution-based technique for growing large-volume stilbene scintillators was developed in 2013; crystals up to diameters of 10 cm, or larger, have been grown while preserving excellent pulse shape discrimination (PSD) properties. The goal of this study is to evaluate the PSD capabilities of 5.08 by 5.08-cm stilbene crystals grown by Lawrence Livermore National Laboratory and Inrad Optics when exposed to a 1000 to 1 gamma ray-neutron ratio and operating at a 100-kHz count rate. Results were compared to an equivalent EJ-309 liquid scintillation detector. 252Cf neutron pulses were recorded in two experiments where 60Co and 137Cs sources created the high-gamma field. The high count rate created numerous double pulses that were cleaned using fractional and template approaches designed to remove double pulses while preserving neutron counts. PSD was performed at a threshold of 42 keVee (440-keV proton) for stilbene and 60 keVee (610-keV proton) for EJ-309 liquid. The lower threshold in stilbene resulted in a neutron intrinsic efficiency of approximately 14.5%, 10% higher than EJ-309 liquid, for bare 252Cf and 13% for 252Cf in the high-gamma field. Despite the lower threshold, the gamma misclassification rate in stilbene was approximately 3×10$$-$$6, nearly a factor-of-five lower than what we found with the EJ-309 liquid.
- Authors:
-
- Univ. of Michigan, Ann Arbor, MI (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
- OSTI Identifier:
- 1487036
- Alternate Identifier(s):
- OSTI ID: 1397529
- Grant/Contract Number:
- NA0002534
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
- Additional Journal Information:
- Journal Volume: 806; 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; Stilbene scintillator; Liquid scintillator; Pulse shape discrimination; Neutron detection
Citation Formats
Bourne, M. M., Clarke, S. D., Adamowicz, N., Pozzi, S. A., Zaitseva, N., and Carman, L. Neutron detection in a high-gamma field using solution-grown stilbene. United States: N. p., 2015.
Web. doi:10.1016/j.nima.2015.10.025.
Bourne, M. M., Clarke, S. D., Adamowicz, N., Pozzi, S. A., Zaitseva, N., & Carman, L. Neutron detection in a high-gamma field using solution-grown stilbene. United States. https://doi.org/10.1016/j.nima.2015.10.025
Bourne, M. M., Clarke, S. D., Adamowicz, N., Pozzi, S. A., Zaitseva, N., and Carman, L. Mon .
"Neutron detection in a high-gamma field using solution-grown stilbene". United States. https://doi.org/10.1016/j.nima.2015.10.025. https://www.osti.gov/servlets/purl/1487036.
@article{osti_1487036,
title = {Neutron detection in a high-gamma field using solution-grown stilbene},
author = {Bourne, M. M. and Clarke, S. D. and Adamowicz, N. and Pozzi, S. A. and Zaitseva, N. and Carman, L.},
abstractNote = {We present that a solution-based technique for growing large-volume stilbene scintillators was developed in 2013; crystals up to diameters of 10 cm, or larger, have been grown while preserving excellent pulse shape discrimination (PSD) properties. The goal of this study is to evaluate the PSD capabilities of 5.08 by 5.08-cm stilbene crystals grown by Lawrence Livermore National Laboratory and Inrad Optics when exposed to a 1000 to 1 gamma ray-neutron ratio and operating at a 100-kHz count rate. Results were compared to an equivalent EJ-309 liquid scintillation detector. 252Cf neutron pulses were recorded in two experiments where 60Co and 137Cs sources created the high-gamma field. The high count rate created numerous double pulses that were cleaned using fractional and template approaches designed to remove double pulses while preserving neutron counts. PSD was performed at a threshold of 42 keVee (440-keV proton) for stilbene and 60 keVee (610-keV proton) for EJ-309 liquid. The lower threshold in stilbene resulted in a neutron intrinsic efficiency of approximately 14.5%, 10% higher than EJ-309 liquid, for bare 252Cf and 13% for 252Cf in the high-gamma field. Despite the lower threshold, the gamma misclassification rate in stilbene was approximately 3×10$-$6, nearly a factor-of-five lower than what we found with the EJ-309 liquid.},
doi = {10.1016/j.nima.2015.10.025},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 806,
place = {United States},
year = {Mon Oct 19 00:00:00 EDT 2015},
month = {Mon Oct 19 00:00:00 EDT 2015}
}
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