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Title: Neutron-Induced Fission Cross Section Measurements for Uranium Isotopes and Other Actinides at LANSCE

Neutron-Induced Fission Cross Section Measurements for Uranium Isotopes and Other Actinides at LANSCE A well established program of neutron-induced fission cross section measurement at Los Alamos Neutron Science Center (LANSCE) is supporting the Fuel Cycle Research program (FC R&D). The incident neutron energy range spans from sub-thermal up to 200 MeV by combining two LANSCE facilities, the Lujan Center and the Weapons Neutron Research center (WNR). The time-of-flight method is implemented to measure the incident neutron energy. A parallel-plate fission ionization chamber was used as a fission fragment detector. The event rate ratio between the investigated foil and a standard {sup 235}U foil is translated into a fission cross section ratio. Thin actinide targets with deposits of <200 {micro}g/cm{sup 2} on stainless steel backing were loaded into a fission chamber. In addition to previously measured data for {sup 237}Np, {sup 239-242}Pu, {sup 243}Am, new measurements include the recently completed {sup 233,238}U isotopes, {sup 236}U data which is being analyzed, and {sup 234}U data acquired in the 2011-2012 LANSCE run cycle. The new data complete the full suite of Uranium isotopes which were investigated with this experimental approach. When analysis of the new measured data is completed, data will be delivered to evaluators. Having data for multiple Uranium isotopes will support theoretical modeling capabilities more » and strengthens nuclear data evaluation. « less
Authors: ; ;
Publication Date:
OSTI Identifier:1048380
Report Number(s):LA-UR-12-23959
TRN: US1204178
DOE Contract Number:AC52-06NA25396
Resource Type:Conference
Data Type:
Resource Relation:Conference: 22nd Intl. Conf. on the Application of Accelerators in Research and Industry ; 2012-08-05 - 2012-08-10 ; Fort Worth, Texas, United States
Research Org:Los Alamos National Laboratory (LANL)
Sponsoring Org:DOE/LANL
Country of Publication:United States
Language:English
Subject: 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 36 MATERIALS SCIENCE; 43 PARTICLE ACCELERATORS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ACCELERATORS; ACTINIDES; CROSS SECTIONS; ENERGY RANGE; EVALUATION; FISSION; FISSION CHAMBERS; FISSION FRAGMENTS; FUEL CYCLE; IONIZATION CHAMBERS; NEUTRONS; RESEARCH PROGRAMS; STAINLESS STEELS; TARGETS; TIME-OF-FLIGHT METHOD; URANIUM ISOTOPES; WEAPONS