Fission cross section ratios for sup 233,234,236 U relative to sup 235 U from 0. 5 to 400 MeV

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5730165

Lisowski, P W; Gavron, A; Parker, W E; Balestrini, S J ^[1]; Carlson, A D; Wasson, O A ^[2]; Hill, N W ^[3]

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1. Los Alamos National Lab., NM (USA)
2. National Inst. of Standards and Technology, Gaithersburg, MD (USA)
3. Oak Ridge National Lab., TN (USA)

Neutron-induced fission cross section ratios from 0.5 to 400 MeV for samples of {sup 233, 234, 236}U relative to {sup 235}U have been measured at the WNR neutron Source at Los Alamos. The fission reaction rate was determined using a fast parallel plate ionization chamber at a 20-m flight path. Cross sections over most the energy range were also extracted using the neutron fluence determined with three different proton telescope arrangements. Those data provided the shape of the {sup 235}U(n,f) cross section relative to the hydrogen scattering cross section. That shape was then normalized to the very accurately known value for {sup 235}U(n,f) at 14.1 MeV to allow us to obtain cross section section values from the ratio data and our values for {sup 235}U(n,f). 6 refs., 1 fig.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5730165
• Report Number(s): LA-UR-91-1621; CONF-910503--19; ON: DE91013227
• Country of Publication: United States
• Language: English

Related Subjects

652020* -- Nuclear Properties & Reactions
A=220 & above
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
BARYON REACTIONS
CROSS SECTIONS
FISSION
HADRON REACTIONS
ISOTOPES
NEUTRON REACTIONS
NEUTRON SOURCES
NUCLEAR DATA COLLECTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE SOURCES
RADIATION SOURCES
URANIUM ISOTOPES