Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight

This work addresses the use of plastic scintillators as an alternative to 3He detectors for radioactive waste drum characterization. The time response of scintillators is three orders of magnitude faster than that of gas proportional counters and they offer similar neutron detection efficiency at lo...

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Autores principales:	Bottau V., Carasco C., Perot B., Eleon C., De Stefano R., Isnel L., Tsekhanovich I.
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	plastic pvt scintillators spontaneous fission prompt neutrons and gamma rays coincidence analysis radioactive waste drums Physics QC1-999
Acceso en línea:	https://doaj.org/article/28b558acba974573b5a0ba248ebacb20
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spelling	oai:doaj.org-article:28b558acba974573b5a0ba248ebacb202021-12-02T17:12:46ZSorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight2100-014X10.1051/epjconf/202125307014https://doaj.org/article/28b558acba974573b5a0ba248ebacb202021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_07014.pdfhttps://doaj.org/toc/2100-014XThis work addresses the use of plastic scintillators as an alternative to 3He detectors for radioactive waste drum characterization. The time response of scintillators is three orders of magnitude faster than that of gas proportional counters and they offer similar neutron detection efficiency at lower cost. However, they are sensitive to gamma rays and the commonly used Pulse Shape Discrimination technique is not possible with basic PVT scintillators. This paper reports on an innovative data processing technique allowing to extract spontaneous fission events from parasitic coincidences, such as those from the (α,n) reactions accompanied by correlated gamma rays or from pure gamma-ray sources emitting correlated radiations. The proposed approach makes advantage of differences in the pulse detection times recorded in measurements with the 252Cf, AmBe and 60Co sources. More precisely, a 2D histogram of time delays between the detected 2nd and 1st pulses, on the x-axis, and between the 3rd and 2nd pulses, on the y-axis, is found to allow for selection of a region of interest most relevant to spontaneous fission events.Bottau V.Carasco C.Perot B.Eleon C.De Stefano R.Isnel L.Tsekhanovich I.EDP Sciencesarticleplastic pvt scintillatorsspontaneous fission prompt neutrons and gamma rayscoincidence analysisradioactive waste drumsPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 07014 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	plastic pvt scintillators spontaneous fission prompt neutrons and gamma rays coincidence analysis radioactive waste drums Physics QC1-999
spellingShingle	plastic pvt scintillators spontaneous fission prompt neutrons and gamma rays coincidence analysis radioactive waste drums Physics QC1-999 Bottau V. Carasco C. Perot B. Eleon C. De Stefano R. Isnel L. Tsekhanovich I. Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight
description	This work addresses the use of plastic scintillators as an alternative to 3He detectors for radioactive waste drum characterization. The time response of scintillators is three orders of magnitude faster than that of gas proportional counters and they offer similar neutron detection efficiency at lower cost. However, they are sensitive to gamma rays and the commonly used Pulse Shape Discrimination technique is not possible with basic PVT scintillators. This paper reports on an innovative data processing technique allowing to extract spontaneous fission events from parasitic coincidences, such as those from the (α,n) reactions accompanied by correlated gamma rays or from pure gamma-ray sources emitting correlated radiations. The proposed approach makes advantage of differences in the pulse detection times recorded in measurements with the 252Cf, AmBe and 60Co sources. More precisely, a 2D histogram of time delays between the detected 2nd and 1st pulses, on the x-axis, and between the 3rd and 2nd pulses, on the y-axis, is found to allow for selection of a region of interest most relevant to spontaneous fission events.
format	article
author	Bottau V. Carasco C. Perot B. Eleon C. De Stefano R. Isnel L. Tsekhanovich I.
author_facet	Bottau V. Carasco C. Perot B. Eleon C. De Stefano R. Isnel L. Tsekhanovich I.
author_sort	Bottau V.
title	Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight
title_short	Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight
title_full	Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight
title_fullStr	Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight
title_full_unstemmed	Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight
title_sort	sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/28b558acba974573b5a0ba248ebacb20
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Sorting fission from parasitic coincidences of neutrons and gamma rays in plastic scintillators using particle times of flight

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