Elastic scattering of 500-MeV polarized protons from Ca40,48, Zr90, and Pb208, and breakdown of the impulse approximation at small momentum transfer

G. W. Hoffmann*, L. Ray, M. L. Barlett, R. Fergerson, J. McGill, E. C. Milner, Kamal K Seth, D. Barlow, M. Bosko, S. Iverson, M. Kaletka, A. Saha, D. Smith

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

117 Scopus citations

Abstract

New 500-MeV ppol+Ca40,48, Zr90, and Pb208 elastic d d and Ay () data are presented. The small-momentum-transfer data are not reproduced by the second-order Kerman-McManus-Thaler optical potential which uses free nucleon-nucleon amplitudes. The systematics of these results, taken together with previous 800-MeV results, suggest that medium modifications to the NN t matrix are required to obtain an accurate description of the 500-800-MeV proton-nucleus elastic data in general.

Original languageEnglish (US)
Pages (from-to)1436-1440
Number of pages5
JournalPhysical review letters
Volume47
Issue number20
DOIs
StatePublished - Jan 1 1981

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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