ENERGY DEPENDENCE OF FAST-NEUTRON ACTIVATION CROSS SECTIONS

Journal Article · Sun Nov 15 04:00:00 EST 1959 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.116.927· OSTI ID:4183139

Johnsrud, A E; Silbert, M G; Barschall, H H

Fast-neutron capture cross sections of 24 nuclides ranging from A = 51 to A = 197 were measured by an activation method, in the neutron energy region from 0.15 to 6.2 Mev. The neutron energy spreads were of the order of 0.1 Mev so that cross sections averaged over many energy levels of the compound nucleus were measured. Activities induced in samples by fast and thermal neutrons were compared. The relative neutron flux in the fast- and thermal-neutron activations were determined with a U/sup 235/ fission counter. A knowledge of the energy dependence of the U/sup 235/ fission cross section and of the thermal-neutron activation cross sections allows calculation of the fastneutron activation cross sections. (auth)

• Research Organization: Univ. of Wisconsin, Madison
• NSA Number: NSA-14-008113
• OSTI ID: 4183139
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 116; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACTIVATION
ATOMS
CAPTURE
COMPOUND NUCLEI
COUNTERS
CROSS SECTIONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
FAST NEUTRONS
FISSION CHAMBERS
MASS
MEASURED VALUES
NEUTRON DETECTION
NEUTRON FLUX
NUCLEAR REACTIONS
NUCLEI
NUMERICALS
PHYSICS
THERMAL NEUTRONS
URANIUM 235