Optical model description of parity-nonconserving neutron resonances

S. E. Koonin, C. W. Johnson, P. Vogel

Research output: Contribution to journalArticlepeer-review


We calculate the average helicity dependence of the low-energy neutron-nucleus cross section in terms of a phenomenological optical model. Comparison with recent measurements on Th232 and U238 by the TRIPLE Collaboration shows that the effective parity-nonconserving interaction is two orders of magnitude larger than estimates based on standard meson-exchange models. The helicity dependence is predicted to oscillate with target mass due to shape resonances.

Original languageEnglish (US)
Pages (from-to)1163-1166
Number of pages4
JournalPhysical Review Letters
Issue number8
StatePublished - 1992

ASJC Scopus subject areas

  • General Physics and Astronomy


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