LiF/ZnS neutron multiplicity counter

Sean Stave, Mary Bliss, Richard Kouzes, Azaree Lintereur, Sean Robinson, Edward Siciliano, Lynn Wood

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The availability of 3He in recent years is becoming restricted with an order of magnitude price increase for this material. Alternatives to the use of 3He for the detection of thermal neutrons are under investigation. One of the most challenging applications for 3He alternatives is in neutron multiplicity counters that provide rapid assay of samples which contain an unknown amount of plutonium in a potentially unknown configuration. With appropriate detector design that has minimal gamma-ray sensitivity and a high detection efficiency even for triple coincidence events, the neutron single, double, and triple coincidence events can be used to extract three unknown parameters such as the 240Pu-effective mass, the sample self-multiplication, and the (α,n) rate. This project is aimed at determining if commercially available 3He alternatives can satisfy this challenging application. Using MCNP modeling the best alternative identified used LiF/ZnS neutron-scintillator sheets and wavelength shifting plastic for light pipes. A four-panel demonstrator module has been constructed, tested, and compared with detailed modeling results. However, to attain that desired high-level of performance two primary design challenges must be addressed. They include building a fast electronics system and robust neutron/gamma-ray discrimination based on pulse shape analysis at high rates. A review of the current effort and the most recent findings will be presented.

Original languageEnglish (US)
Pages (from-to)208-212
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume784
DOIs
StatePublished - Jun 1 2015

Fingerprint

neutron counters
Neutrons
neutrons
Gamma rays
gamma rays
plutonium
thermal neutrons
multiplication
scintillation counters
availability
Plutonium
discrimination
plastics
modules
Phosphors
Fiber optics
Assays
Electronic equipment
Availability
detectors

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Stave, Sean ; Bliss, Mary ; Kouzes, Richard ; Lintereur, Azaree ; Robinson, Sean ; Siciliano, Edward ; Wood, Lynn. / LiF/ZnS neutron multiplicity counter. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2015 ; Vol. 784. pp. 208-212.
@article{56fe404e0fc7459cbbe11b71c87a1065,
title = "LiF/ZnS neutron multiplicity counter",
abstract = "The availability of 3He in recent years is becoming restricted with an order of magnitude price increase for this material. Alternatives to the use of 3He for the detection of thermal neutrons are under investigation. One of the most challenging applications for 3He alternatives is in neutron multiplicity counters that provide rapid assay of samples which contain an unknown amount of plutonium in a potentially unknown configuration. With appropriate detector design that has minimal gamma-ray sensitivity and a high detection efficiency even for triple coincidence events, the neutron single, double, and triple coincidence events can be used to extract three unknown parameters such as the 240Pu-effective mass, the sample self-multiplication, and the (α,n) rate. This project is aimed at determining if commercially available 3He alternatives can satisfy this challenging application. Using MCNP modeling the best alternative identified used LiF/ZnS neutron-scintillator sheets and wavelength shifting plastic for light pipes. A four-panel demonstrator module has been constructed, tested, and compared with detailed modeling results. However, to attain that desired high-level of performance two primary design challenges must be addressed. They include building a fast electronics system and robust neutron/gamma-ray discrimination based on pulse shape analysis at high rates. A review of the current effort and the most recent findings will be presented.",
author = "Sean Stave and Mary Bliss and Richard Kouzes and Azaree Lintereur and Sean Robinson and Edward Siciliano and Lynn Wood",
year = "2015",
month = "6",
day = "1",
doi = "10.1016/j.nima.2015.01.039",
language = "English (US)",
volume = "784",
pages = "208--212",
journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
issn = "0168-9002",
publisher = "Elsevier",

}

LiF/ZnS neutron multiplicity counter. / Stave, Sean; Bliss, Mary; Kouzes, Richard; Lintereur, Azaree; Robinson, Sean; Siciliano, Edward; Wood, Lynn.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 784, 01.06.2015, p. 208-212.

Research output: Contribution to journalArticle

TY - JOUR

T1 - LiF/ZnS neutron multiplicity counter

AU - Stave, Sean

AU - Bliss, Mary

AU - Kouzes, Richard

AU - Lintereur, Azaree

AU - Robinson, Sean

AU - Siciliano, Edward

AU - Wood, Lynn

PY - 2015/6/1

Y1 - 2015/6/1

N2 - The availability of 3He in recent years is becoming restricted with an order of magnitude price increase for this material. Alternatives to the use of 3He for the detection of thermal neutrons are under investigation. One of the most challenging applications for 3He alternatives is in neutron multiplicity counters that provide rapid assay of samples which contain an unknown amount of plutonium in a potentially unknown configuration. With appropriate detector design that has minimal gamma-ray sensitivity and a high detection efficiency even for triple coincidence events, the neutron single, double, and triple coincidence events can be used to extract three unknown parameters such as the 240Pu-effective mass, the sample self-multiplication, and the (α,n) rate. This project is aimed at determining if commercially available 3He alternatives can satisfy this challenging application. Using MCNP modeling the best alternative identified used LiF/ZnS neutron-scintillator sheets and wavelength shifting plastic for light pipes. A four-panel demonstrator module has been constructed, tested, and compared with detailed modeling results. However, to attain that desired high-level of performance two primary design challenges must be addressed. They include building a fast electronics system and robust neutron/gamma-ray discrimination based on pulse shape analysis at high rates. A review of the current effort and the most recent findings will be presented.

AB - The availability of 3He in recent years is becoming restricted with an order of magnitude price increase for this material. Alternatives to the use of 3He for the detection of thermal neutrons are under investigation. One of the most challenging applications for 3He alternatives is in neutron multiplicity counters that provide rapid assay of samples which contain an unknown amount of plutonium in a potentially unknown configuration. With appropriate detector design that has minimal gamma-ray sensitivity and a high detection efficiency even for triple coincidence events, the neutron single, double, and triple coincidence events can be used to extract three unknown parameters such as the 240Pu-effective mass, the sample self-multiplication, and the (α,n) rate. This project is aimed at determining if commercially available 3He alternatives can satisfy this challenging application. Using MCNP modeling the best alternative identified used LiF/ZnS neutron-scintillator sheets and wavelength shifting plastic for light pipes. A four-panel demonstrator module has been constructed, tested, and compared with detailed modeling results. However, to attain that desired high-level of performance two primary design challenges must be addressed. They include building a fast electronics system and robust neutron/gamma-ray discrimination based on pulse shape analysis at high rates. A review of the current effort and the most recent findings will be presented.

UR - http://www.scopus.com/inward/record.url?scp=84939982119&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84939982119&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2015.01.039

DO - 10.1016/j.nima.2015.01.039

M3 - Article

AN - SCOPUS:84939982119

VL - 784

SP - 208

EP - 212

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

SN - 0168-9002

ER -