Role of multi-step processes in 16O(11B,12C)15N at 41.25 MeV

N. Ikeda, F. Nakamura, Y. Inotani, K. Koga, M. Koga, S. Koto, T. Sugimitsu, H. Fujita, S. Morinobu

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

The 16O(11B,12C)15N reaction at 41.25 MeV has been investigated using the kinematical coincidence method. Polarization tensors t20 and t40 of 12C[2+1] for the quantization axis taken along the direction of propagation have been measured at center-of-mass angles (Θc.m.) between 48° and 62° by analyzing the energy spectrum of 12C[2+1] modulated by the effect of γ-ray emission. The cross-sections of the transfer reactions leading to the 12C[g.s.] + 15N[g.s.], 12C[2+1] + 15N[g.s.] and 12C[g.s.] + 15N[3/2-1] final states have also been measured in the range 48° ≤ Θc.m. ≤ 120°. The polarization tensor terms of 12C[2+1] largely deviating from zero have been observed, contrary to the prediction by the distorted-wave Born approximation (DWBA). The one-step DWBA calculation also fails in describing the transfer reaction cross-sections. It is shown that the coupled channel model calculation including excitations and reorientations in 11B and 12C satisfactorily reproduces both the tensor terms and the cross-sections of the transfer reactions. The multi-step processes passing through the excited states of 11B are found to significantly contribute to the reaction.

元の言語英語
ページ(範囲)213-220
ページ数8
ジャーナルEuropean Physical Journal A
9
発行部数2
DOI
出版物ステータス出版済み - 1 1 2000

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tensors
Born approximation
center of mass
cross sections
polarization
retraining
excitation
rays
energy spectra
propagation
predictions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

これを引用

Ikeda, N., Nakamura, F., Inotani, Y., Koga, K., Koga, M., Koto, S., ... Morinobu, S. (2000). Role of multi-step processes in 16O(11B,12C)15N at 41.25 MeV. European Physical Journal A, 9(2), 213-220. https://doi.org/10.1007/s100500070040

Role of multi-step processes in 16O(11B,12C)15N at 41.25 MeV. / Ikeda, N.; Nakamura, F.; Inotani, Y.; Koga, K.; Koga, M.; Koto, S.; Sugimitsu, T.; Fujita, H.; Morinobu, S.

:: European Physical Journal A, 巻 9, 番号 2, 01.01.2000, p. 213-220.

研究成果: ジャーナルへの寄稿記事

Ikeda, N, Nakamura, F, Inotani, Y, Koga, K, Koga, M, Koto, S, Sugimitsu, T, Fujita, H & Morinobu, S 2000, 'Role of multi-step processes in 16O(11B,12C)15N at 41.25 MeV', European Physical Journal A, 巻. 9, 番号 2, pp. 213-220. https://doi.org/10.1007/s100500070040
Ikeda, N. ; Nakamura, F. ; Inotani, Y. ; Koga, K. ; Koga, M. ; Koto, S. ; Sugimitsu, T. ; Fujita, H. ; Morinobu, S. / Role of multi-step processes in 16O(11B,12C)15N at 41.25 MeV. :: European Physical Journal A. 2000 ; 巻 9, 番号 2. pp. 213-220.
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abstract = "The 16O(11B,12C)15N reaction at 41.25 MeV has been investigated using the kinematical coincidence method. Polarization tensors t20 and t40 of 12C[2+1] for the quantization axis taken along the direction of propagation have been measured at center-of-mass angles (Θc.m.) between 48° and 62° by analyzing the energy spectrum of 12C[2+1] modulated by the effect of γ-ray emission. The cross-sections of the transfer reactions leading to the 12C[g.s.] + 15N[g.s.], 12C[2+1] + 15N[g.s.] and 12C[g.s.] + 15N[3/2-1] final states have also been measured in the range 48° ≤ Θc.m. ≤ 120°. The polarization tensor terms of 12C[2+1] largely deviating from zero have been observed, contrary to the prediction by the distorted-wave Born approximation (DWBA). The one-step DWBA calculation also fails in describing the transfer reaction cross-sections. It is shown that the coupled channel model calculation including excitations and reorientations in 11B and 12C satisfactorily reproduces both the tensor terms and the cross-sections of the transfer reactions. The multi-step processes passing through the excited states of 11B are found to significantly contribute to the reaction.",
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AU - Ikeda, N.

AU - Nakamura, F.

AU - Inotani, Y.

AU - Koga, K.

AU - Koga, M.

AU - Koto, S.

AU - Sugimitsu, T.

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AU - Morinobu, S.

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N2 - The 16O(11B,12C)15N reaction at 41.25 MeV has been investigated using the kinematical coincidence method. Polarization tensors t20 and t40 of 12C[2+1] for the quantization axis taken along the direction of propagation have been measured at center-of-mass angles (Θc.m.) between 48° and 62° by analyzing the energy spectrum of 12C[2+1] modulated by the effect of γ-ray emission. The cross-sections of the transfer reactions leading to the 12C[g.s.] + 15N[g.s.], 12C[2+1] + 15N[g.s.] and 12C[g.s.] + 15N[3/2-1] final states have also been measured in the range 48° ≤ Θc.m. ≤ 120°. The polarization tensor terms of 12C[2+1] largely deviating from zero have been observed, contrary to the prediction by the distorted-wave Born approximation (DWBA). The one-step DWBA calculation also fails in describing the transfer reaction cross-sections. It is shown that the coupled channel model calculation including excitations and reorientations in 11B and 12C satisfactorily reproduces both the tensor terms and the cross-sections of the transfer reactions. The multi-step processes passing through the excited states of 11B are found to significantly contribute to the reaction.

AB - The 16O(11B,12C)15N reaction at 41.25 MeV has been investigated using the kinematical coincidence method. Polarization tensors t20 and t40 of 12C[2+1] for the quantization axis taken along the direction of propagation have been measured at center-of-mass angles (Θc.m.) between 48° and 62° by analyzing the energy spectrum of 12C[2+1] modulated by the effect of γ-ray emission. The cross-sections of the transfer reactions leading to the 12C[g.s.] + 15N[g.s.], 12C[2+1] + 15N[g.s.] and 12C[g.s.] + 15N[3/2-1] final states have also been measured in the range 48° ≤ Θc.m. ≤ 120°. The polarization tensor terms of 12C[2+1] largely deviating from zero have been observed, contrary to the prediction by the distorted-wave Born approximation (DWBA). The one-step DWBA calculation also fails in describing the transfer reaction cross-sections. It is shown that the coupled channel model calculation including excitations and reorientations in 11B and 12C satisfactorily reproduces both the tensor terms and the cross-sections of the transfer reactions. The multi-step processes passing through the excited states of 11B are found to significantly contribute to the reaction.

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