Spin-isospin excitations studied by polarized beams

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

Research output: Contribution to journalArticle

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Abstract

The spin-parity Jπ of the spin dipole resonances (SDR) in 12 N and 12 B are investigated via the measurements of polarization observables, the transverse polarization transfer coefficient D NN for the (p ,n ) reaction at 197 and 295 MeV and the tensor analyzing power A xx for the (d , 2 He) reaction at 270 MeV. The polarization observables, D NN and A xx 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
JournalNuclear Physics A
Volume599
Issue number1-2
DOIs
Publication statusPublished - Mar 18 1996
Externally publishedYes

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polarization
excitation
predictions
parity
tensors
dipoles
coefficients

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). https://doi.org/10.1016/0375-9474(96)00062-0

Spin-isospin excitations studied by polarized beams. / Sakai, H.; Okamura, H.; Otsu, H.; Wakasa, Tomotsugu; Fujita, S.; Sakamoto, N.; Uesaka, T.; Satou, Y.; Nonaka, T.; Oonishi, T.; Ishida, S.; Greenfield, M. B.; Hatanaka, K.

In: Nuclear Physics A, Vol. 599, No. 1-2, 18.03.1996.

Research output: Contribution to journalArticle

Sakai, H, Okamura, H, Otsu, H, Wakasa, T, Fujita, S, Sakamoto, N, Uesaka, T, Satou, Y, Nonaka, T, Oonishi, T, Ishida, S, Greenfield, MB & Hatanaka, K 1996, 'Spin-isospin excitations studied by polarized beams', Nuclear Physics A, vol. 599, no. 1-2. https://doi.org/10.1016/0375-9474(96)00062-0
Sakai H, Okamura H, Otsu H, Wakasa T, Fujita S, Sakamoto N et al. Spin-isospin excitations studied by polarized beams. Nuclear Physics A. 1996 Mar 18;599(1-2). https://doi.org/10.1016/0375-9474(96)00062-0
Sakai, H. ; Okamura, H. ; Otsu, H. ; Wakasa, Tomotsugu ; Fujita, S. ; Sakamoto, N. ; Uesaka, T. ; Satou, Y. ; Nonaka, T. ; Oonishi, T. ; Ishida, S. ; Greenfield, M. B. ; Hatanaka, K. / Spin-isospin excitations studied by polarized beams. In: Nuclear Physics A. 1996 ; Vol. 599, No. 1-2.
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abstract = "The spin-parity Jπ of the spin dipole resonances (SDR) in 12 N and 12 B are investigated via the measurements of polarization observables, the transverse polarization transfer coefficient D NN for the (p → ,n → ) reaction at 197 and 295 MeV and the tensor analyzing power A xx for the (d → , 2 He) reaction at 270 MeV. The polarization observables, D NN and A xx 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.",
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AU - Sakai, H.

AU - Okamura, H.

AU - Otsu, H.

AU - Wakasa, Tomotsugu

AU - Fujita, S.

AU - Sakamoto, N.

AU - Uesaka, T.

AU - Satou, Y.

AU - Nonaka, T.

AU - Oonishi, T.

AU - Ishida, S.

AU - Greenfield, M. B.

AU - Hatanaka, K.

PY - 1996/3/18

Y1 - 1996/3/18

N2 - The spin-parity Jπ of the spin dipole resonances (SDR) in 12 N and 12 B are investigated via the measurements of polarization observables, the transverse polarization transfer coefficient D NN for the (p → ,n → ) reaction at 197 and 295 MeV and the tensor analyzing power A xx for the (d → , 2 He) reaction at 270 MeV. The polarization observables, D NN and A xx 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.

AB - The spin-parity Jπ of the spin dipole resonances (SDR) in 12 N and 12 B are investigated via the measurements of polarization observables, the transverse polarization transfer coefficient D NN for the (p → ,n → ) reaction at 197 and 295 MeV and the tensor analyzing power A xx for the (d → , 2 He) reaction at 270 MeV. The polarization observables, D NN and A xx 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.

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