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Nonquenched Isoscalar Spin-M1 Excitations in sd-Shell Nuclei.
Matsubara, H; Tamii, A; Nakada, H; Adachi, T; Carter, J; Dozono, M; Fujita, H; Fujita, K; Fujita, Y; Hatanaka, K; Horiuchi, W; Itoh, M; Kawabata, T; Kuroita, S; Maeda, Y; Navrátil, P; von Neumann-Cosel, P; Neveling, R; Okamura, H; Popescu, L; Poltoratska, I; Richter, A; Rubio, B; Sakaguchi, H; Sakaguchi, S; Sakemi, Y; Sasamoto, Y; Shimbara, Y; Shimizu, Y; Smit, F D; Suda, K; Tameshige, Y; Tokieda, H; Yamada, Y; Yosoi, M; Zenihiro, J.
Afiliação
  • Matsubara H; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Tamii A; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Nakada H; Department of Physics, Chiba University, Inage, Chiba 263-8522, Japan.
  • Adachi T; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Carter J; School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa.
  • Dozono M; Department of Physics, Kyushu University, Fukuoka 812-8581, Japan.
  • Fujita H; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Fujita K; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Fujita Y; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Hatanaka K; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Horiuchi W; Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.
  • Itoh M; Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai, Miyagi 980-8578, Japan.
  • Kawabata T; Center for Nuclear Study (CNS), University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
  • Kuroita S; Department of Physics, Kyushu University, Fukuoka 812-8581, Japan.
  • Maeda Y; Department of Applied Physics, Miyazaki University, Miyazaki 889-2192, Japan.
  • Navrátil P; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada.
  • von Neumann-Cosel P; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Neveling R; iThemba LABS, National Research Foundation, Somerset West 7129, South Africa.
  • Okamura H; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Popescu L; Vakgroep Subatomaire en Stralingsfysica, Universiteit Gent, B-9000 Gent, Belgium.
  • Poltoratska I; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Richter A; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Rubio B; Instituto of Fisica Corpuscular, CSIC-University de Valencia, E-46071 Valencia, Spain.
  • Sakaguchi H; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Sakaguchi S; Center for Nuclear Study (CNS), University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
  • Sakemi Y; Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai, Miyagi 980-8578, Japan.
  • Sasamoto Y; Center for Nuclear Study (CNS), University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
  • Shimbara Y; Graduate School of Science and Technology, Niigata University, Niigata 950-2102, Japan.
  • Shimizu Y; Center for Nuclear Study (CNS), University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
  • Smit FD; iThemba LABS, National Research Foundation, Somerset West 7129, South Africa.
  • Suda K; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Tameshige Y; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Tokieda H; Center for Nuclear Study (CNS), University of Tokyo, Bunkyo, Tokyo 113-0033, Japan.
  • Yamada Y; Department of Physics, Kyushu University, Fukuoka 812-8581, Japan.
  • Yosoi M; Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan.
  • Zenihiro J; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Phys Rev Lett ; 115(10): 102501, 2015 Sep 04.
Article em En | MEDLINE | ID: mdl-26382672
ABSTRACT
Differential cross sections of isoscalar and isovector spin-M1 (0(+)→1(+)) transitions are measured using high-energy-resolution proton inelastic scattering at E(p)=295 MeV on (24)Mg, (28)Si, (32)S, and (36)Ar at 0°-14°. The squared spin-M1 nuclear transition matrix elements are deduced from the measured differential cross sections by applying empirically determined unit cross sections based on the assumption of isospin symmetry. The ratios of the squared nuclear matrix elements accumulated up to E(x)=16 MeV compared to a shell-model prediction are 1.01(9) for isoscalar and 0.61(6) for isovector spin-M1 transitions, respectively. Thus, no quenching is observed for isoscalar spin-M1 transitions, while the matrix elements for isovector spin-M1 transitions are quenched by an amount comparable with the analogous Gamow-Teller transitions on those target nuclei.
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Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2015 Tipo de documento: Article
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Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2015 Tipo de documento: Article