INELASTIC NEUTRON SCATTERING BY U$sup 23$$sup 8$

Journal Article · Sat Mar 15 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys.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.109.2063· OSTI ID:4341206

Cranberg, L; Levin, J S

Monoenergetic neutrons in the range 0.5 to 2 Mev have been scattered from U/sup 238/ and thc spectra of scattered neutrons have been investigated by a time-of-flight method. Levels have been locoated at 0.044 plus or minus 0.004, 0.146 plus or minus 0.006, 0.30 plus or minus 0.03, 0.73 plus or minus 0.02, 0.98 plus or minus 0.02, 1.06 plus or minus 0.03, omd 1.26 plus or minus 0.04 Mev. The cross sections for excitations of these levels have been obtained corresponding to inelastic neutron scattering at 90 deg . An angular distribution has been obtained for the inelastically scattered neutrons corresponding to excitation of the 44-kev level by incident neutrons of 550-kev energy. This distribution is of the form A(1-B cos/sup 2/ theta ) where A is 0.135 plus or minus 0.02 barn per steradian and B is 0.45 plus or minus 0.1. The cross section is in good agreement with calculations by Chase and Wilets which indicate compound nucleus formation is the dominant mechanism in inelastic neutron scattering by U/sup 238/ at 550 kev, although the anisotropy is larger than that predicted. (auth)

• Research Organization: Los Alamos Scientific Lab., N. Mex.
• NSA Number: NSA-12-008908
• OSTI ID: 4341206
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 109; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
ANISOTROPY
COMPOUND NUCLEI
CROSS SECTIONS
ENERGY LEVELS
ENERGY RANGE
EXCITATION
NEUTRON SPECTROMETERS
NEUTRONS
NUCLEI
PHYSICS
SCATTERING
SPECTRA
URANIUM 238