TY - JOUR

T1 - Cross sections and polarization observables for the 40Ca(p,n) reaction at 345 MeV and multistep contributions in the continuum

AU - Wakasa, T.

AU - Hatanaka, K.

AU - Sakai, H.

AU - Sakai, H.

AU - Greenfield, M. B.

AU - Kamiya, J.

AU - Ogata, K.

AU - Okamura, H.

AU - Sekiguchi, K.

AU - Suda, K.

AU - Tamii, A.

AU - Yako, K.

PY - 2002/3

Y1 - 2002/3

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevC.65.034615

DO - 10.1103/PhysRevC.65.034615

M3 - Article

AN - SCOPUS:4043065843

VL - 65

SP - 346151

EP - 346158

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 3

M1 - 034615

ER -