Digital pile-up rejection for plutonium experiments with solution-grown stilbene

Bourne, M. M.; Clarke, S. D.; Paff, M.; DiFulvio, A.; Norsworthy, M.; Pozzi, S. A.

doi:10.1016/j.nima.2016.10.023

Title: Digital pile-up rejection for plutonium experiments with solution-grown stilbene

Abstract

A solution-grown stilbene detector was used in several experiments with plutonium samples including plutonium oxide, mixed oxide, and plutonium metal samples. Neutrons from different reactions and plutonium isotopes are accompanied by numerous gamma rays especially by the 59-keV gamma ray of 241Am. Identifying neutrons correctly is important for nuclear nonproliferation applications and makes neutron/gamma discrimination and pile-up rejection necessary. Each experimental dataset is presented with and without pile-up filtering using a previously developed algorithm. The experiments were simulated using MCNPX-PoliMi, a Monte Carlo code designed to accurately model scintillation detector response. Collision output from MCNPX-PoliMi was processed using the specialized MPPost post-processing code to convert neutron energy depositions event-by-event into light pulses. The model was compared to experimental data after pulse-shape discrimination identified waveforms as gamma ray or neutron interactions. We show that the use of the digital pile-up rejection algorithm allows for accurate neutron counting with stilbene to within 2% even when not using lead shielding

Authors:: Bourne, M. M.; Clarke, S. D.; Paff, M.; DiFulvio, A.; Norsworthy, M.; Pozzi, S. A.

Publication Date:: Sun Jan 01 00:00:00 EST 2017

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:: 1485410

Alternate Identifier(s):: OSTI ID: 1416760

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: 842; Journal Issue: C; Journal ID: ISSN 0168-9002

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Citation Formats


                    Bourne, M. M., Clarke, S. D., Paff, M., DiFulvio, A., Norsworthy, M., and Pozzi, S. A. Digital pile-up rejection for plutonium experiments with solution-grown stilbene.  United States: N. p., 2017. 
Web.  doi:10.1016/j.nima.2016.10.023.

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                    Bourne, M. M., Clarke, S. D., Paff, M., DiFulvio, A., Norsworthy, M., & Pozzi, S. A. Digital pile-up rejection for plutonium experiments with solution-grown stilbene.  United States.  https://doi.org/10.1016/j.nima.2016.10.023

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                    Bourne, M. M., Clarke, S. D., Paff, M., DiFulvio, A., Norsworthy, M., and Pozzi, S. A. Sun .  
"Digital pile-up rejection for plutonium experiments with solution-grown stilbene".  United States.  https://doi.org/10.1016/j.nima.2016.10.023.  https://www.osti.gov/servlets/purl/1485410.

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@article{osti_1485410,

  title        = {Digital pile-up rejection for plutonium experiments with solution-grown stilbene},

  author       = {Bourne, M. M. and Clarke, S. D. and Paff, M. and DiFulvio, A. and Norsworthy, M. and Pozzi, S. A.},

  abstractNote = {A solution-grown stilbene detector was used in several experiments with plutonium samples including plutonium oxide, mixed oxide, and plutonium metal samples. Neutrons from different reactions and plutonium isotopes are accompanied by numerous gamma rays especially by the 59-keV gamma ray of 241Am. Identifying neutrons correctly is important for nuclear nonproliferation applications and makes neutron/gamma discrimination and pile-up rejection necessary. Each experimental dataset is presented with and without pile-up filtering using a previously developed algorithm. The experiments were simulated using MCNPX-PoliMi, a Monte Carlo code designed to accurately model scintillation detector response. Collision output from MCNPX-PoliMi was processed using the specialized MPPost post-processing code to convert neutron energy depositions event-by-event into light pulses. The model was compared to experimental data after pulse-shape discrimination identified waveforms as gamma ray or neutron interactions. We show that the use of the digital pile-up rejection algorithm allows for accurate neutron counting with stilbene to within 2% even when not using lead shielding},

  doi          = {10.1016/j.nima.2016.10.023},

  journal      = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},

  number       = C,

  volume       = 842,

  place        = {United States},

  year         = {Sun Jan 01 00:00:00 EST 2017},

  month        = {Sun Jan 01 00:00:00 EST 2017}

}

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Cited by: 11 works

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Figures / Tables:

Table I: Details for stilbene experiments of each source.

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