RADIATIVE-CAPTURE CROSS-SECTIONS OF Mn$sup 55$, Cu$sup 65$, Ba$sup 138$, AND Th$sup 232$ FOR 0.3 TO 2 Mev NEUTRONS

Journal Article · Mon May 01 00:00:00 EDT 1961 · Atomnaya Energ.

OSTI ID:4841406

Stavisskii, Yu Ya; Tolstikov, V A

Neutron radiative-capture cross sections for Mn/sup 55/ Cu/sup 65/ Ba/ sup 138/, and Th /sup 232/ were measured. The results are plott ed and correlated with published data. Contrary to previous data, in which Mn/sup >5/ radiative neutron capture cross sections remain constant, the experimental cross sections drop smoothly with energy along the total neutron energy range. The radiative neutron capture by even-even Ba/sup 138/ Th/sup 232/ nuclei and odd-odd Cu/sup 65/ nuclei remains constant at a wide neutron energy range with a wide maximum for the Ba/sup 138/ cross section, which indicates the important role of neutrons with 1) 0. The neutron energy magnitudes at which the cross sections diminish are well correlated with excitation levels. The radiative neutron capture cross secing to nuclear reaction statistics and the semi-transparent nuclear model indicate that the sigma (n, gamma ) relation to neutron energy is determined by the contribution of nuclear waves with 1) 0 and competition with inelastic scattering. The diminished capture cross section in Th at E) 900 kev is the result of competition with inelastic scattering and fission. (R.V.J.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-028480
• OSTI ID: 4841406
• Journal Information: Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 10
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ANGULAR MOMENTUM
BARIUM 138
CAPTURE
COPPER 65
CROSS SECTIONS
DIAGRAMS
ENERGY LEVELS
ENERGY RANGE
EXCITATION
FISSION
GAMMA RADIATION
KEV RANGE
MANGANESE 55
MEASURED VALUES
MOMENTUM
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
OPTICAL MODEL
PHYSICS
SCATTERING
THORIUM 232