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Title: Fission Product Yields from {sup 232}Th, {sup 238}U, and {sup 235}U Using 14 MeV Neutrons

Abstract

Neutron-induced fission yield studies using deuterium-tritium fusion-produced 14 MeV neutrons have not yet directly measured fission yields from fission products with half-lives on the order of seconds (far from the line of nuclear stability). Fundamental data of this nature are important for improving and validating the current models of the nuclear fission process. Cyclic neutron activation analysis (CNAA) was performed on three actinide targets–thorium-oxide, depleted uranium metal, and highly enriched uranium metal–at the University of Michigan's Neutron Science Laboratory (UM-NSL) using a pneumatic system and Thermo-Scientific D711 accelerator-based fusion neutron generator. This was done to measure the fission yields of short-lived fission products and to examine the differences between the delayed fission product signatures of the three actinides. The measured data were compared against previously published results for {sup 89}Kr, −90, and −92 and {sup 138}Xe, −139, and −140. The average percent deviation of the measured values from the Evaluated Nuclear Data Files VII.1 (ENDF/B-VII.1) for thorium, depleted-uranium, and highly-enriched uranium were −10.2%, 4.5%, and −12.9%, respectively. In addition to the measurements of the six known fission products, 23 new fission yield measurements from {sup 84}As to {sup 146}La are presented.

Authors:
 [1];  [2];  [3];  [4];  [1]
  1. Department of Nuclear Engineering Radiological Sciences, University of Michigan, 2355 Bonisteel Blvd., Ann Arbor, MI 48109 (United States)
  2. (United States)
  3. Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352 (United States)
  4. Department of Mechanical and Nuclear Engineering, Pennsylvania State University, 227 Reber Bldg., University Park, PA 16802 (United States)
Publication Date:
OSTI Identifier:
22645632
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Data Sheets; Journal Volume: 139; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ARSENIC 84; DEPLETED URANIUM; DEUTERIUM; FISSION; FISSION PRODUCTS; FISSION YIELD; HIGHLY ENRICHED URANIUM; KRYPTON 89; KRYPTON 90; KRYPTON 92; LANTHANUM 146; MEV RANGE 10-100; NEUTRON ACTIVATION ANALYSIS; NEUTRON GENERATORS; NEUTRONS; NUCLEAR DATA COLLECTIONS; THORIUM; THORIUM 232; THORIUM OXIDES; TRITIUM; URANIUM 235; URANIUM 238; XENON 138; XENON 139; XENON 140

Citation Formats

Pierson, B.D., E-mail: bpnuke@umich.edu, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, Greenwood, L.R., Flaska, M., and Pozzi, S.A. Fission Product Yields from {sup 232}Th, {sup 238}U, and {sup 235}U Using 14 MeV Neutrons. United States: N. p., 2017. Web. doi:10.1016/J.NDS.2017.01.004.
Pierson, B.D., E-mail: bpnuke@umich.edu, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, Greenwood, L.R., Flaska, M., & Pozzi, S.A. Fission Product Yields from {sup 232}Th, {sup 238}U, and {sup 235}U Using 14 MeV Neutrons. United States. doi:10.1016/J.NDS.2017.01.004.
Pierson, B.D., E-mail: bpnuke@umich.edu, Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352, Greenwood, L.R., Flaska, M., and Pozzi, S.A. Sun . "Fission Product Yields from {sup 232}Th, {sup 238}U, and {sup 235}U Using 14 MeV Neutrons". United States. doi:10.1016/J.NDS.2017.01.004.
@article{osti_22645632,
title = {Fission Product Yields from {sup 232}Th, {sup 238}U, and {sup 235}U Using 14 MeV Neutrons},
author = {Pierson, B.D., E-mail: bpnuke@umich.edu and Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352 and Greenwood, L.R. and Flaska, M. and Pozzi, S.A.},
abstractNote = {Neutron-induced fission yield studies using deuterium-tritium fusion-produced 14 MeV neutrons have not yet directly measured fission yields from fission products with half-lives on the order of seconds (far from the line of nuclear stability). Fundamental data of this nature are important for improving and validating the current models of the nuclear fission process. Cyclic neutron activation analysis (CNAA) was performed on three actinide targets–thorium-oxide, depleted uranium metal, and highly enriched uranium metal–at the University of Michigan's Neutron Science Laboratory (UM-NSL) using a pneumatic system and Thermo-Scientific D711 accelerator-based fusion neutron generator. This was done to measure the fission yields of short-lived fission products and to examine the differences between the delayed fission product signatures of the three actinides. The measured data were compared against previously published results for {sup 89}Kr, −90, and −92 and {sup 138}Xe, −139, and −140. The average percent deviation of the measured values from the Evaluated Nuclear Data Files VII.1 (ENDF/B-VII.1) for thorium, depleted-uranium, and highly-enriched uranium were −10.2%, 4.5%, and −12.9%, respectively. In addition to the measurements of the six known fission products, 23 new fission yield measurements from {sup 84}As to {sup 146}La are presented.},
doi = {10.1016/J.NDS.2017.01.004},
journal = {Nuclear Data Sheets},
number = ,
volume = 139,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2017},
month = {Sun Jan 15 00:00:00 EST 2017}
}