Measurements of the neutron fission cross sections of /sup 235/U and /sup 239/Pu

Journal Article · Sat Sep 01 00:00:00 EDT 1984 · Nucl. Sci. Eng.; (United States)

OSTI ID:6150333

Gwin, R; Ingle, R W; Scoles, S W; Spencer, R R; Todd, J H

Measurements were made of the energy dependence of the /sup 235/U neutron fission cross section over the energy range from 0.01 eV to 30 keV and of the /sup 239/Pu fission cross section over the range from 0.01 to 60 eV. The energy integral of the fission cross section for /sup 235/U was normalized to 19.26 b X eV in the 0.0206- to 0.06239-eV interval; this yielded a value of 248 + or - 1.7 b X eV for the 7.8to 11-eV interval, which is in good agreement with other measurements normalized in the same manner. The energy integral for /sup 239/Pu was normalized to 25.15 b X eV in the 0.02001- to 0.06001eV interval; the resulting value of 504 b X eV in the 9- to 12.6-eV interval was also in good agreement with other data. For the energy ranges covered, the energy dependence of both the /sup 235/U fission cross section and the /sup 239/Pu fission cross section is consistent with ENDF/B-V data except for a few energy intervals in which the /sup 235/U cross section differs by as much as 4%.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, TN
• OSTI ID: 6150333
• Journal Information: Nucl. Sci. Eng.; (United States), Vol. 88:1
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
NEUTRON REACTIONS
CROSS SECTIONS
MEASURING METHODS
PLUTONIUM
URANIUM
ENERGY DEPENDENCE
ENERGY RANGE
FISSION
ACTINIDES
BARYON REACTIONS
ELEMENTS
HADRON REACTIONS
METALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
TRANSURANIUM ELEMENTS
220100* - Nuclear Reactor Technology- Theory & Calculation