Fission Fragment Atomic Number Measurements Using Bragg Detectors

Nikolay Sosnin; Alastair Smith; Tobias Wright; U  Koster; A  Blanc; B.S. Nara Singh; R.L. Kennedy-Reid; Paul John Davies

doi:10.1016/j.nima.2020.163397

Fission Fragment Atomic Number Measurements Using Bragg Detectors

Nikolay Sosnin, Alastair Smith, Tobias Wright, U Koster, A Blanc, B.S. Nara Singh, R.L. Kennedy-Reid, Paul John Davies

Research output: Contribution to journal › Article › peer-review

Abstract

A Bragg detector with a Frisch grid and 1 metre-long time-of-ﬂight section with microchannel plate assemblies was characterized at the Lohengrin ﬁssion fragment separator at the Institut Laue-Langevin (ILL) by measuring 235U ﬁssion fragments of selected masses and energiesat the Lohengrinfocal plane. The aim of the measurementswas to investigate the response of Bragg detectors to diﬀering nuclear charge states. Energy-loss and a signal-risetime dependent parameters were deﬁned and extracted from the accumulated signal pulse shapes, and their behaviouras a function of fragment velocitywas investigated. The experimentalresults are compared to a SRIM-2013 simulation. Measurements of ﬁssion fragment ranges in isobutane are presented. Average proton numbers for measured fragment masses were identiﬁed and could be resolved by the parameters, which exhibited monotonic variation with charge. The results diﬀered from SRIM both in trends and in values, with SRIM simulations exhibiting non-monotonic behaviour with protonnumber.

Original language	English
Article number	163397
Journal	Nuclear Instruments and Methods in Physics Research
Volume	957
Early online date	10 Jan 2020
DOIs	https://doi.org/10.1016/j.nima.2020.163397
Publication status	Published - 21 Mar 2020

Keywords

fission fragment charge
SRIM
ionization chamber
sub-Bragg peak spectroscopy
Lohengrin
fission fragment range

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@article{f65e41370ef4435588bb6d1b62648e4e,

title = "Fission Fragment Atomic Number Measurements Using Bragg Detectors",

abstract = "A Bragg detector with a Frisch grid and 1 metre-long time-of-ﬂight section with microchannel plate assemblies was characterized at the Lohengrin ﬁssion fragment separator at the Institut Laue-Langevin (ILL) by measuring 235U ﬁssion fragments of selected masses and energiesat the Lohengrinfocal plane. The aim of the measurementswas to investigate the response of Bragg detectors to diﬀering nuclear charge states. Energy-loss and a signal-risetime dependent parameters were deﬁned and extracted from the accumulated signal pulse shapes, and their behaviouras a function of fragment velocitywas investigated. The experimentalresults are compared to a SRIM-2013 simulation. Measurements of ﬁssion fragment ranges in isobutane are presented. Average proton numbers for measured fragment masses were identiﬁed and could be resolved by the parameters, which exhibited monotonic variation with charge. The results diﬀered from SRIM both in trends and in values, with SRIM simulations exhibiting non-monotonic behaviour with protonnumber. ",

keywords = "fission fragment charge, SRIM, ionization chamber, sub-Bragg peak spectroscopy, Lohengrin, fission fragment range",

author = "Nikolay Sosnin and Alastair Smith and Tobias Wright and U Koster and A Blanc and Singh, {B.S. Nara} and R.L. Kennedy-Reid and Davies, {Paul John}",

year = "2020",

month = mar,

day = "21",

doi = "10.1016/j.nima.2020.163397",

language = "English",

volume = "957",

journal = "Nuclear Instruments and Methods in Physics Research",

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T1 - Fission Fragment Atomic Number Measurements Using Bragg Detectors

AU - Sosnin, Nikolay

AU - Smith, Alastair

AU - Wright, Tobias

AU - Koster, U

AU - Blanc, A

AU - Singh, B.S. Nara

AU - Kennedy-Reid, R.L.

AU - Davies, Paul John

PY - 2020/3/21

Y1 - 2020/3/21

N2 - A Bragg detector with a Frisch grid and 1 metre-long time-of-ﬂight section with microchannel plate assemblies was characterized at the Lohengrin ﬁssion fragment separator at the Institut Laue-Langevin (ILL) by measuring 235U ﬁssion fragments of selected masses and energiesat the Lohengrinfocal plane. The aim of the measurementswas to investigate the response of Bragg detectors to diﬀering nuclear charge states. Energy-loss and a signal-risetime dependent parameters were deﬁned and extracted from the accumulated signal pulse shapes, and their behaviouras a function of fragment velocitywas investigated. The experimentalresults are compared to a SRIM-2013 simulation. Measurements of ﬁssion fragment ranges in isobutane are presented. Average proton numbers for measured fragment masses were identiﬁed and could be resolved by the parameters, which exhibited monotonic variation with charge. The results diﬀered from SRIM both in trends and in values, with SRIM simulations exhibiting non-monotonic behaviour with protonnumber.

AB - A Bragg detector with a Frisch grid and 1 metre-long time-of-ﬂight section with microchannel plate assemblies was characterized at the Lohengrin ﬁssion fragment separator at the Institut Laue-Langevin (ILL) by measuring 235U ﬁssion fragments of selected masses and energiesat the Lohengrinfocal plane. The aim of the measurementswas to investigate the response of Bragg detectors to diﬀering nuclear charge states. Energy-loss and a signal-risetime dependent parameters were deﬁned and extracted from the accumulated signal pulse shapes, and their behaviouras a function of fragment velocitywas investigated. The experimentalresults are compared to a SRIM-2013 simulation. Measurements of ﬁssion fragment ranges in isobutane are presented. Average proton numbers for measured fragment masses were identiﬁed and could be resolved by the parameters, which exhibited monotonic variation with charge. The results diﬀered from SRIM both in trends and in values, with SRIM simulations exhibiting non-monotonic behaviour with protonnumber.

KW - fission fragment charge

KW - SRIM

KW - ionization chamber

KW - sub-Bragg peak spectroscopy

KW - Lohengrin

KW - fission fragment range

U2 - 10.1016/j.nima.2020.163397

DO - 10.1016/j.nima.2020.163397

M3 - Article

SN - 0167-5087

VL - 957

JO - Nuclear Instruments and Methods in Physics Research

JF - Nuclear Instruments and Methods in Physics Research

M1 - 163397

ER -

Fission Fragment Atomic Number Measurements Using Bragg Detectors

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Keywords

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