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Title: Total Kinetic Energy and Fragment Mass Distribution of Neutron-Induced Fission of U-233

Abstract

Properties of fission in U-233 were studied at the Los Alamos Neutron Science Center (LANSCE) at incident neutron energies from thermal to 40 MeV at both the Lujan Neutron Scattering Center flight path 12 and at WNR flight path 90-Left from Dec 2016 to Jan 2017. Fission fragments are observed in coincidence using a twin ionization chamber with Frisch grids. The average total kinetic energy (TKE) released from fission and fragment mass distributions are calculated from observations of energy deposited in the detector and conservation of mass and momentum. Accurate experimental measurements of these parameters are necessary to better understand the fission process and obtain data necessary for calculating criticality. The average TKE released from fission has been well characterized for several isotopes at thermal neutron energy, however, few measurements have been made at fast neutron energies. This experiment expands on previous successful experiments using an ionization chamber to measure TKE and fragment mass distributions of U-235, U-238, and Pu-239. This experiment requires the full spectrum of neutron energies and can therefore only be performed at a small number of facilities in the world. The required full neutron energy spectrum is obtained by combining measurements from WNR 90L and Lujanmore » FP12 at LANSCE.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1396153
Report Number(s):
LA-UR-17-28914
TRN: US1800079
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; URANIUM 233; URANIUM 235; NEUTRON DIFFRACTION; PLUTONIUM 239; URANIUM 238; KINETIC ENERGY

Citation Formats

Higgins, Daniel James, Schmitt, Kyle Thomas, Mosby, Shea Morgan, and Tovesson, Fredrik. Total Kinetic Energy and Fragment Mass Distribution of Neutron-Induced Fission of U-233. United States: N. p., 2017. Web. doi:10.2172/1396153.
Higgins, Daniel James, Schmitt, Kyle Thomas, Mosby, Shea Morgan, & Tovesson, Fredrik. Total Kinetic Energy and Fragment Mass Distribution of Neutron-Induced Fission of U-233. United States. doi:10.2172/1396153.
Higgins, Daniel James, Schmitt, Kyle Thomas, Mosby, Shea Morgan, and Tovesson, Fredrik. Fri . "Total Kinetic Energy and Fragment Mass Distribution of Neutron-Induced Fission of U-233". United States. doi:10.2172/1396153. https://www.osti.gov/servlets/purl/1396153.
@article{osti_1396153,
title = {Total Kinetic Energy and Fragment Mass Distribution of Neutron-Induced Fission of U-233},
author = {Higgins, Daniel James and Schmitt, Kyle Thomas and Mosby, Shea Morgan and Tovesson, Fredrik},
abstractNote = {Properties of fission in U-233 were studied at the Los Alamos Neutron Science Center (LANSCE) at incident neutron energies from thermal to 40 MeV at both the Lujan Neutron Scattering Center flight path 12 and at WNR flight path 90-Left from Dec 2016 to Jan 2017. Fission fragments are observed in coincidence using a twin ionization chamber with Frisch grids. The average total kinetic energy (TKE) released from fission and fragment mass distributions are calculated from observations of energy deposited in the detector and conservation of mass and momentum. Accurate experimental measurements of these parameters are necessary to better understand the fission process and obtain data necessary for calculating criticality. The average TKE released from fission has been well characterized for several isotopes at thermal neutron energy, however, few measurements have been made at fast neutron energies. This experiment expands on previous successful experiments using an ionization chamber to measure TKE and fragment mass distributions of U-235, U-238, and Pu-239. This experiment requires the full spectrum of neutron energies and can therefore only be performed at a small number of facilities in the world. The required full neutron energy spectrum is obtained by combining measurements from WNR 90L and Lujan FP12 at LANSCE.},
doi = {10.2172/1396153},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 29 00:00:00 EDT 2017},
month = {Fri Sep 29 00:00:00 EDT 2017}
}

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