Fast neutron excitation of the ground-state rotational band of $sup 238$U

Technical Report · Mon Sep 01 04:00:00 EDT 1975

DOI:https://doi.org/10.2172/4105285· OSTI ID:4105285

Guenther, P; Havel, D; Smith, A

The differential neutron cross sections for the excitation of the 2+(45 keV), 4+(148 keV) and 6+(308 keV) states of $sup 238$U are measured for scattered neutron energies in the range 0.1 to 3.0 MeV. The observed excitation cross sections vary smoothly with energy with no significant fluctuations. The experimental results are correlated with the predictions of compound-nucleus and direct-reaction models. At lower energies (less than or approximately equal to 0.8 MeV) the observed inelastic scattering cross sections are consistent in shape and magnitude with the predictions of compound-nucleus theory. Above approximately or equal to 1.0 MeV comparison of measured and calculated values indicates large direct-reaction contributions. The experimental and computational results are compared with the evaluated nuclear data file, ENDF/B- IV, and significant discrepancies are noted. The present results and selected values from the literature are used to deduce an evaluated set of $sup 238$U inelastic scattering cross sections. 11 figures, 4 tables. (auth)

• Research Organization: Argonne National Lab., Ill. (USA)
• NSA Number: NSA-33-013676
• OSTI ID: 4105285
• Report Number(s): ANL/NDM--16
• Country of Publication: United States
• Language: English

Related Subjects

*URANIUM 238-- ROTATIONAL STATES
643403*
DIFFERENTIAL CROSS SECTIONS
GROUND STATES
KEV RANGE 100-1000
MEV RANGE 01-10
N69131* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
A >= 220--Energy Levels & Transitions
N69151 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
A >= 220--Nuclear Reactions & Scattering