TY - JOUR
T1 - Analyzing powers for proton inelastic scattering to unnatural-parity states in Ca40 and Si28
AU - Hosono, K.
AU - Matsuoka, N.
AU - Hatanaka, K.
AU - Saito, T.
AU - Noro, T.
AU - Kondo, M.
AU - Kato, S.
AU - Okada, K.
AU - Ogino, K.
AU - Kadota, Y.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1982
Y1 - 1982
N2 - Cross sections and analyzing powers in proton inelastic scattering leading to unnatural parity states of 2-, T=0 (6.025 and 6.75 MeV), 2-, T=1 (8.42 MeV) in Ca40 and 6-, T=0 (11.58 MeV) and 6-, T=1 (14.36 MeV) in Si28 were measured at 65 MeV. These states are pair states of different isospin with the same spin and parity. The analyzing powers for a pair of T=0 and T=1 excitations in Ca40 show an isospin dependence not observed in Si28. The measured angular distributions were compared with microscopic distorted-wave Born approximation calculations using two versions of the effective nucleon-nucleon interaction. As expected, the interaction emphasizing the tensor contribution predicts analyzing powers and cross sections in better agreement with the experimental data. As factors to produce a difference in the analyzing powers between the T=0 and the T=1 states, the effect of two transferred orbital angular momentum amplitudes allowed in a transition and the energy dependence of the isoscalar spin-dependent terms in the effective interaction are discussed. NUCLEAR REACTIONS Ca40(p→,p′)Ca40, Si28(p→,p′)Si28, Mg24(p→,p′)Mg24, E=65 MeV, unnatural parity states of Ex=6-15 MeV, measured σ(θ), analyzing power Ay(θ), resolution ∼35 keV, DWBA analysis.
AB - Cross sections and analyzing powers in proton inelastic scattering leading to unnatural parity states of 2-, T=0 (6.025 and 6.75 MeV), 2-, T=1 (8.42 MeV) in Ca40 and 6-, T=0 (11.58 MeV) and 6-, T=1 (14.36 MeV) in Si28 were measured at 65 MeV. These states are pair states of different isospin with the same spin and parity. The analyzing powers for a pair of T=0 and T=1 excitations in Ca40 show an isospin dependence not observed in Si28. The measured angular distributions were compared with microscopic distorted-wave Born approximation calculations using two versions of the effective nucleon-nucleon interaction. As expected, the interaction emphasizing the tensor contribution predicts analyzing powers and cross sections in better agreement with the experimental data. As factors to produce a difference in the analyzing powers between the T=0 and the T=1 states, the effect of two transferred orbital angular momentum amplitudes allowed in a transition and the energy dependence of the isoscalar spin-dependent terms in the effective interaction are discussed. NUCLEAR REACTIONS Ca40(p→,p′)Ca40, Si28(p→,p′)Si28, Mg24(p→,p′)Mg24, E=65 MeV, unnatural parity states of Ex=6-15 MeV, measured σ(θ), analyzing power Ay(θ), resolution ∼35 keV, DWBA analysis.
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U2 - 10.1103/PhysRevC.26.1440
DO - 10.1103/PhysRevC.26.1440
M3 - Article
AN - SCOPUS:4043090024
VL - 26
SP - 1440
EP - 1450
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 4
ER -