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Title: Improved fission neutron energy discrimination with 4 He detectors through pulse filtering

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1417095
Grant/Contract Number:
15-8286
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 848; Journal Issue: C; Related Information: CHORUS Timestamp: 2018-01-16 12:53:41; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Zhu, Ting, Liang, Yinong, Rolison, Lucas, Barker, Cathleen, Lewis, Jason, Gokhale, Sasmit, Chandra, Rico, Kiff, Scott, Chung, Heejun, Ray, Heather, Baciak, James E., Enqvist, Andreas, and Jordan, Kelly A. Improved fission neutron energy discrimination with 4 He detectors through pulse filtering. Netherlands: N. p., 2017. Web. doi:10.1016/j.nima.2016.12.016.
Zhu, Ting, Liang, Yinong, Rolison, Lucas, Barker, Cathleen, Lewis, Jason, Gokhale, Sasmit, Chandra, Rico, Kiff, Scott, Chung, Heejun, Ray, Heather, Baciak, James E., Enqvist, Andreas, & Jordan, Kelly A. Improved fission neutron energy discrimination with 4 He detectors through pulse filtering. Netherlands. doi:10.1016/j.nima.2016.12.016.
Zhu, Ting, Liang, Yinong, Rolison, Lucas, Barker, Cathleen, Lewis, Jason, Gokhale, Sasmit, Chandra, Rico, Kiff, Scott, Chung, Heejun, Ray, Heather, Baciak, James E., Enqvist, Andreas, and Jordan, Kelly A. Wed . "Improved fission neutron energy discrimination with 4 He detectors through pulse filtering". Netherlands. doi:10.1016/j.nima.2016.12.016.
@article{osti_1417095,
title = {Improved fission neutron energy discrimination with 4 He detectors through pulse filtering},
author = {Zhu, Ting and Liang, Yinong and Rolison, Lucas and Barker, Cathleen and Lewis, Jason and Gokhale, Sasmit and Chandra, Rico and Kiff, Scott and Chung, Heejun and Ray, Heather and Baciak, James E. and Enqvist, Andreas and Jordan, Kelly A.},
abstractNote = {},
doi = {10.1016/j.nima.2016.12.016},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 848,
place = {Netherlands},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.nima.2016.12.016

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  • Some measurements on the suitability for pulse-shape discrimination of some commercially available organic scintillators are reported. Preliminary observations of the high-energy neutron groups from the Be/sup 9/ (He/sup 4/,n) C/ sup 12/ and the Be/sup 9/(He/sup 3/,n)C/sup 11/ reactions were made. (W.D.M.)
  • 3He gas based neutron linear-position-sensitive detectors (LPSDs) have been applied for many neutron scattering instruments. Traditional Pulse-Height Analysis (PHA) for Neutron-Gamma Discrimination (NGD) resulted in the neutron-gamma efficiency ratio on the orders of 10 5-10 6. The NGD ratios of 3He detectors need to be improved for even better scientific results from neutron scattering. Digital Signal Processing (DSP) analyses of waveforms were proposed for obtaining better NGD ratios, based on features extracted from rise-time, pulse amplitude, charge integration, a simplified Wiener filter, and the cross-correlation between individual and template waveforms of neutron and gamma events. Fisher linear discriminant analysis (FLDA)more » and three multivariate analyses (MVAs) of the features were performed. The NGD ratios are improved by about 10 2-10 3 times compared with the traditional PHA method. Finally, our results indicate the NGD capabilities of 3He tube detectors can be significantly improved with subspace-learning based methods, which may result in a reduced data-collection time and better data quality for further data reduction.« less
  • In order to improve the gamma discrimination capability for thermal neutron measurements using silicon PIN detectors, a novel approach of use of thin epitaxial silicon PIN detectors was investigated. Thin epitaxial silicon detectors with thickness of 15 µm were developed and their performance was tested with thermal neutrons using {sup 10}B converter. The performance of this detector was compared with the performance of a 300 µm silicon detector. The results of experiments presented in this paper indicate that thin epitaxial silicon detectors can significantly improve γ discrimination for thermal neutron measurements.