Fragment Angular Distributions in Neutron-Induced Fission of {sup 235}U and {sup 239}Pu using a Time Projection Chamber

Conference · Wed Jul 01 04:00:00 EDT 2015

OSTI ID:22531411

Kleinrath, Verena ^[1]

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1. NIFFTE collaboration, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

Fission fragment angular distributions can lend insights into fission barrier shapes and level densities at the scission point, both important for fission theory development. Fragment emission anisotropies are also valuable for precision cross section ratio measurements, if the distributions are different for the two isotopes used in the ratio. Available angular data is sparse for {sup 235}U and even more so for {sup 239}Pu, especially at neutron energies above 5 MeV. The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) time projection chamber, which enables precise tracking of charged particles, can be used to study angular distributions and emission anisotropies of fission fragments in neutron-induced fission. In-beam data collected at the Los Alamos Neutron Science Center with a {sup 235}U/{sup 239}Pu target during the 2014 run-cycle will provide angular distributions as a function of incident neutron energy for these isotopes. (LA-UR-1426972). (authors)

• Research Organization: Institute of Electrical and Electronics Engineers - IEEE, 3 Park Avenue, 17th Floor, New York, N.Y. 10016-5997 (United States)
• OSTI ID: 22531411
• Report Number(s): ANIMMA--2015-IO-371
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANISOTROPY
CHARGED PARTICLES
CROSS SECTIONS
ENERGY-LEVEL DENSITY
FISSION
FISSION BARRIER
FISSION FRAGMENTS
LOS ALAMOS
MEV RANGE
NEUTRONS
PLUTONIUM 239
TIME PROJECTION CHAMBERS
URANIUM 235