Spin-isospin excitations studied by polarized beams

H. Sakai, H. Okamura, H. Otsu, T. Wakasa, S. Fujita, N. Sakamoto, T. Uesaka, Y. Satou, T. Nonaka, T. Oonishi, S. Ishida, M. B. Greenfield, K. Hatanaka

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Abstract

The spin-parity Jπ of the spin dipole resonances (SDR) in 12N and 12B are investigated via the measurements of polarization observables, the transverse polarization transfer coefficient DNN for the (p,n) reaction at 197 and 295 MeV and the tensor analyzing power Axx for the (d, 2He) reaction at 270 MeV. The polarization observables, DNN and Axx for the peak at 4.5 MeV are consistent with the DWIA prediction with 2- but those for the peak at 7.5 MeV contradict the predictions with an expected Jπ = 1-. Neither polarization observables could detect any concentration of 0- strength. The usefulness of these spin observables in identifying Jπ is shown.

Original languageEnglish
Pages (from-to)197C-210C
JournalNuclear Physics A
Volume599
Issue number1-2
DOIs
Publication statusPublished - Mar 18 1996
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Sakai, H., Okamura, H., Otsu, H., Wakasa, T., Fujita, S., Sakamoto, N., ... Hatanaka, K. (1996). Spin-isospin excitations studied by polarized beams. Nuclear Physics A, 599(1-2), 197C-210C. https://doi.org/10.1016/0375-9474(96)00062-0