A new measurement of the 6Li(n,α)t cross section at MeV energies using a 252Cf fission chamber and 6Li scintillators

Kirsch, Leo Edward; Devlin, Matthew James; Mosby, Shea Morgan; Gomez, Jaime A.

doi:10.1016/j.nima.2017.08.046

Title: A new measurement of the ⁶Li(n,α)t cross section at MeV energies using a ²⁵²Cf fission chamber and ⁶Li scintillators

Abstract

A new measurement is presented of the 6Li(n,α)t cross section from 245 keV to 10 MeV using a 252Cf fission chamber with 6LiI(Eu) and Cs2LiYCl6:Ce (CLYC) scintillators which act as both target and detector. Neutron energies are determined from the time of flight (TOF) method using the signals from spontaneous fission and reaction product recoil. Simulations of neutron downscatter in the crystals and fission chamber bring 6Li(n,α)t cross section values measured with the 6LiI(Eu) into agreement with previous experiments and evaluations, except for two resonances at 4.2 and 6.5 MeV introduced by ENDF/B-VII.1. Suspected neutron transport modeling issues cause the cross section values obtained with CLYC to be discrepant above 2 MeV.

Authors:

Kirsch, Leo Edward ^[1];

^[2];

^[2]; Gomez, Jaime A. ^[2]

Univ. of California, Berkeley, CA (United States). Nuclear Engineering Dept.
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Fri Sep 01 00:00:00 EDT 2017

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Krell Institute, Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Science (SC). Nuclear Physics (NP) (SC-26); USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1392811

Alternate Identifier(s):: OSTI ID: 1399344; OSTI ID: 1549907

Report Number(s):: LA-UR-17-23596
Journal ID: ISSN 0168-9002

Grant/Contract Number:: AC52-06NA25396; NA0002135

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: 874; Journal ID: ISSN 0168-9002

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Cross section; 252Cf fission chamber; 6Li; Scintillator; CLYC; LiI(Eu); 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Kirsch, Leo Edward, Devlin, Matthew James, Mosby, Shea Morgan, and Gomez, Jaime A. A new measurement of the 6Li(n,α)t cross section at MeV energies using a 252Cf fission chamber and 6Li scintillators.  United States: N. p., 2017. 
Web.  doi:10.1016/j.nima.2017.08.046.

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                    Kirsch, Leo Edward, Devlin, Matthew James, Mosby, Shea Morgan, & Gomez, Jaime A. A new measurement of the 6Li(n,α)t cross section at MeV energies using a 252Cf fission chamber and 6Li scintillators.  United States.  https://doi.org/10.1016/j.nima.2017.08.046

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                    Kirsch, Leo Edward, Devlin, Matthew James, Mosby, Shea Morgan, and Gomez, Jaime A. Fri .  
"A new measurement of the 6Li(n,α)t cross section at MeV energies using a 252Cf fission chamber and 6Li scintillators".  United States.  https://doi.org/10.1016/j.nima.2017.08.046.  https://www.osti.gov/servlets/purl/1392811.

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@article{osti_1392811,

  title        = {A new measurement of the 6Li(n,α)t cross section at MeV energies using a 252Cf fission chamber and 6Li scintillators},

  author       = {Kirsch, Leo Edward and Devlin, Matthew James and Mosby, Shea Morgan and Gomez, Jaime A.},

  abstractNote = {A new measurement is presented of the 6Li(n,α)t cross section from 245 keV to 10 MeV using a 252Cf fission chamber with 6LiI(Eu) and Cs2LiYCl6:Ce (CLYC) scintillators which act as both target and detector. Neutron energies are determined from the time of flight (TOF) method using the signals from spontaneous fission and reaction product recoil. Simulations of neutron downscatter in the crystals and fission chamber bring 6Li(n,α)t cross section values measured with the 6LiI(Eu) into agreement with previous experiments and evaluations, except for two resonances at 4.2 and 6.5 MeV introduced by ENDF/B-VII.1. Suspected neutron transport modeling issues cause the cross section values obtained with CLYC to be discrepant above 2 MeV.},

  doi          = {10.1016/j.nima.2017.08.046},

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

  number       = ,

  volume       = 874,

  place        = {United States},

  year         = {Fri Sep 01 00:00:00 EDT 2017},

  month        = {Fri Sep 01 00:00:00 EDT 2017}

}

Copy to clipboard

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Title: A new measurement of the 6Li(n,α)t cross section at MeV energies using a 252Cf fission chamber and 6Li scintillators

Abstract

Citation Formats

The molten salt reactor (MSR) in generation IV: Overview and perspectives journal, November 2014

Neutron Standard Cross Sections for 1H and 6Li from R-Matrix Analyses and Microscopic Calculations for the N-N and 7Li Systems conference, January 2005

Differential Cross Section Measurements for the [sup 6]Li(n,t)α Reaction in the Few MeV Region conference, January 2009

Low energy scattering cross sections for n + Li 6 , 7 reactions using the continuum-discretized coupled-channels method journal, June 2016

Lithium Isotopic Abundances in Metal‐poor Halo Stars journal, June 2006

Simultaneous solution to the Li 6 and Li 7 big bang nucleosynthesis problems from a long-lived negatively charged leptonic particle journal, December 2007

Total cross sections for the 6Li(n, α)3H reaction between 2 and 10 MeV journal, October 1979

Study of the Neutron Reactions Li 6 ( n , α ) H 3 , F 19 ( n , γ ) F 20 , and I 127 ( n , γ ) I 128 journal, April 1959

Cross Section for the Li 6 ( n , α ) H 3 Reaction for 1.2 <~ E n <~ 8.0 Mev journal, September 1959

Calibration of a Li-glass detector for neutron energies above 50 keV by the 1H(t,n) 3He reaction journal, November 1994

6 Li( n ,α)T Cross Section from 70 to 3000 keV from the 235 U( n,f ) Calibration of a Thin Glass Scintillator journal, August 1979

Differential Cross-Section Measurement for the 6 Li( n,t ) 4 He Reaction at 3.67 and 4.42 MeV journal, March 2000

Li 6 ( n , α ) H 3 Cross Section as a Function of Neutron Energy journal, August 1956

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Detection of Slow Neutrons journal, June 1951

Activation of LiI Crystal Phosphors journal, March 1952

Activation of Lithium Iodide by Europium journal, March 1953

Response curves of alkali halide scintillators with special reference to the Li6(n,α) reaction in lithium iodide journal, July 1958

A sensitive spectrometer for fast neutrons using 6LiI(Eu) journal, November 1969

Optical and scintillation properties of pure and Ce3+-doped Cs2LiYCl6 and Li3YCl6:Ce3+ crystals journal, October 1999

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Title: A new measurement of the ⁶Li(n,α)t cross section at MeV energies using a ²⁵²Cf fission chamber and ⁶Li scintillators

The molten salt reactor (MSR) in generation IV: Overview and perspectives
journal, November 2014

Neutron Standard Cross Sections for 1H and 6Li from R-Matrix Analyses and Microscopic Calculations for the N-N and 7Li Systems
conference, January 2005

Differential Cross Section Measurements for the [sup 6]Li(n,t)α Reaction in the Few MeV Region
conference, January 2009

Low energy scattering cross sections for $n + {}^{6, 7}{Li}$ reactions using the continuum-discretized coupled-channels method
journal, June 2016

Lithium Isotopic Abundances in Metal‐poor Halo Stars
journal, June 2006

Simultaneous solution to the ${}^{6}{Li}$ and ${}^{7}{Li}$ big bang nucleosynthesis problems from a long-lived negatively charged leptonic particle
journal, December 2007

Total cross sections for the 6Li(n, α)3H reaction between 2 and 10 MeV
journal, October 1979

Study of the Neutron Reactions ${Li}^{6} (n, α) H^{3}$ , $F^{19} (n, γ) F^{20}$ , and $I^{127} (n, γ) I^{128}$
journal, April 1959

Cross Section for the ${Li}^{6} (n, α) H^{3}$ Reaction for $1.2 <~ E_{n} <~ 8.0$ Mev
journal, September 1959

Calibration of a Li-glass detector for neutron energies above 50 keV by the 1H(t,n) 3He reaction
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⁶ Li( n ,α)T Cross Section from 70 to 3000 keV from the ²³⁵ U( n,f ) Calibration of a Thin Glass Scintillator
journal, August 1979

Differential Cross-Section Measurement for the ⁶ Li( n,t ) ⁴ He Reaction at 3.67 and 4.42 MeV
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journal, August 1956

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journal, November 2014

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journal, June 1951

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journal, July 1958

A sensitive spectrometer for fast neutrons using 6LiI(Eu)
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journal, October 1999

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