Subthreshold fission cross section of /sup 240/Pu and the fission cross sections of /sup 235/U and /sup 239/Pu

Journal Article · Sun Jan 01 00:00:00 EST 1984 · Nucl. Sci. Eng.; (United States)

OSTI ID:5490040

Weston, L W; Todd, J H

The subthreshold fission cross section of 240 Pu was measured relative to the /sup 10/B(n,..cap alpha..) or the /sup 6/Li(n,..cap alpha..) cross sections from 20 eV to 100 keV. Resonance parameter fits to the data were derived from 20 to 5700 eV. Many more resonances and more resonance structure were observed than in previous measurements. During the course of this measurement, the fission cross sections of /sup 235/U and /sup 239/Pu were also measured and are compared to the ENDF/B-V evaluation. The /sup 235/U experiment is in good agreement with ENDF/B-V; however, the /sup 239/Pu measurement is lower than ENDF/B-V and many of the previous measurements, particularly above 25 KeV. 16 references, 12 figures, 8 tables.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 5490040
• Journal Information: Nucl. Sci. Eng.; (United States), Vol. 88
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
NEUTRON REACTIONS
THERMAL FISSION
PLUTONIUM 239 TARGET
PLUTONIUM 240 TARGET
URANIUM 235 TARGET
CROSS SECTIONS
EXPERIMENTAL DATA
FISSION BARRIER
FISSION RATIO
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
RESONANCE
BARYON REACTIONS
DATA
ENERGY RANGE
FISSION
HADRON REACTIONS
INFORMATION
KEV RANGE
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
POTENTIALS
TARGETS
652026* - Nuclear Properties & Reactions
A=220 & above
Experimental- Spontaneous & Induced Fission- (-1987)