Cross sections and polarization observables for the 40Ca(p,n) reaction at 345 MeV and multistep contributions in the continuum

T. Wakasa, K. Hatanaka, H. Sakai, H. Sakai, M. B. Greenfield, J. Kamiya, K. Ogata, H. Okamura, K. Sekiguchi, K. Suda, A. Tamii, K. Yako

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Abstract

The double-differential cross sections and analyzing powers over an angular range of 30° ≤ θlab ≤ 75°, and the induced polarizations P and polarization transfer values DNN at 30° and 40° for the 40Ca(p,n) reaction are measured at a bombarding energy of 345 MeV. The data are compared with theoretical calculations in a semiclassical distorted wave (SCDW) model employing through three- and two-step contributions for cross sections and polarization observables, respectively. At forward angles, the SCDW calculations reproduce the observed cross sections fairly well around the quasielastic peak. The one-step contribution is dominant at θlab = 30°, while the two- and three-step contributions become more important with increasing reaction angle. At backward angles the calculations underestimate the cross sections in the whole region, which indicates the significance of higher-step contributions. The DNN values, which are sensitive to the effective nucleon-nucleon interaction in the nuclear medium, are close to those calculated with the G-matrix interaction parametrized by the Melbourne group.

Original languageEnglish
Article number034615
Pages (from-to)346151-346158
Number of pages8
JournalPhysical Review C - Nuclear Physics
Volume65
Issue number3
DOIs
Publication statusPublished - Mar 2002
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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