Third IAEA evaluation of the 2200 m/s and 20/sup 0/C Maxwellian neutron data for /sup 233/U, /sup 235/U, /sup 239/Pu, and /sup 241/Pu

Conference · Wed Oct 01 04:00:00 EDT 1975 · Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)

OSTI ID:7354451

Lemmel, H D

A new consistent set of best values of 2200 m/s and 20/sup 0/C Maxwellian neutron cross-sections, fission-neutron yields, and Westcott g-factors are presented for U-233, U-235, Pu-239 and Pu-241, and of related reference values such as the spontaneous fission-neutron yield of Cf-252, the mean fission-neutron spectrum energies of the five nuclides named, the ..cap alpha..-decay half-lives of U-233, U-234 and Pu-239 and others. This consistent set of values is derived from a multi-parameter least-squares fit of all available experimental data, after reviewing and, where feasible, re-assessing the authors' quoted values and errors usually after consultation with the authors. The new best set of values is significantly different from that of the Second IAEA Review of 1969. The major changes are due to new lower experimental values of ..nu..-bar (Cf-252) and of half-lives. Also discussed are some disturbing unresolved discrepancies among experimental data, which leave the accuracies of some parameters, for example the uranium fission cross-sections, still unsatisfactory. 3 tables, 2 figures. (auth)

• Research Organization: International Atomic Energy Agency, Vienna
• OSTI ID: 7354451
• Conference Information: Journal Name: Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States) Journal Volume: 1
• Country of Publication: United States
• Language: English

Related Subjects

652022 -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Radioactive Decay-- (-1987)
652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
BARYONS
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DECAY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
FISSION
FISSION NEUTRONS
FISSION YIELD
HADRON REACTIONS
HADRONS
HALF-LIFE
HEAVY NUCLEI
ISOTOPES
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PARTICLE DECAY
PLUTONIUM 239 TARGET
PLUTONIUM 241 TARGET
RADIOISOTOPES
SPONTANEOUS FISSION
TARGETS
URANIUM 233 TARGET
URANIUM 234
URANIUM 235 TARGET
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
YIELDS