Probing reaction dynamics with the [Formula Presented] reactions for [Formula Presented]

L. A. Bernstein, J. A. Becker, W. Younes, D. E. Archer, K. Hauschild, G. D. Johns, R. O. Nelson, W. S. Wilburn, D. M. Drake

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Discrete γ-ray spectra have been measured as a function of incident neutron energy for nuclei produced in the [Formula Presented] reactions. Spectroscopy was done using the large-scale Compton suppressed Ge γ-ray spectrometer GEANIE. The “white” source neutron beam was produced at the Los Alamos Neutron Science WNR facility. Reaction neutron energy was determined using the time-of-flight technique. Reaction-channel yields were inferred from the measured intensity sum of the [Formula Presented] and the [Formula Presented] transitions for the [Formula Presented] reactions for [Formula Presented] Weisskopf-Ewing calculations (including precompound) done with the HMS-ALICE code correctly predict the bulk of the [Formula Presented] reaction products for low multiplicity. However, they do not accurately predict yield ratios of the different [Formula Presented] reactions for [Formula Presented] In addition, there is no consistent experimental indication of charged-particle reaction channels [Formula Presented] for incident neutron energies above 60 MeV where they are predicted to account for approximately [Formula Presented] of the total reaction cross section. Several possible causes are discussed for these discrepancies. Finally, the region of [Formula Presented] phase space populated in this reaction is probed for several of the strongest reaction channels through the observation of relative yields for different yrast and off-yrast states.

Original languageEnglish
Pages (from-to)R2799-R2803
JournalPhysical Review C - Nuclear Physics
Volume57
Issue number6
DOIs
StatePublished - 1998
Externally publishedYes

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