Isovector and isoscalar spin-flip M1 strengths in11B

T. Kawabata, H. Akimune, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Y. Hara, K. Hatanaka, T. Ishikawa, M. Itoh, J. Kamiya, S. Kishi, M. Nakmura, K. Nakanishi, Tetsuo Noro, H. Sakaguchi, Y. Shimbara, H. Takeda, A. TamiiS. Terashima, H. Toyokawa, M. Uchida, H. Ueno, Tomotsugu Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi

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Abstract

The 11B(3He,t), and 11B(d,d′), and 11B(p,p′) reactions were measured at forward scattering angles including 0° to study the isovector and isoscalar spin-flip M1 strengths in 11B. The measured 11B(3He,t) cross sections were compared with the results of the distorted-wave impulse-approximation (DWIA) calculation, and the Gamow-Teller (GT) strengths for low-lying states in 11C were determined. The GT strengths were converted to the isovector spin-flip M1 strengths using the isobaric analog relations under the assumption of the isospin symmetry. The isoscalar spin-flip M1 strengths were obtained from the (d,d′) analysis by assuming that the shape of the collective transition form factor with the same ΔJπ is similar in the 11B(d,d′) and 12C(d,d′) reactions. The obtained isovector and isoscalar strengths were used in the DWIA calculations for the 11B(p,p′) reaction. The DWIA calculation reasonably well explains the present 11B(p,p′) result. However, the calculated cross section for the 8.92-MeV 3/22-, state was significantly smaller than the experimental values. The transition strengths obtained in the shell-model calculations were found to be 20-50 % larger than the experimental strengths. The transition strengths for the neutrino induced reactions were estimated by using the isovector and isoscalar spin-flip Ml strengths. The present results are quantitatively in agreement with the theoretical estimation discussing the axial isoscalar coupling in the neutrino scattering process, and are useful in the measurement of the stellar neutrinos using the neutral- and charged-current reactions on 11B.

Original languageEnglish
Article number034318
Pages (from-to)343181-3431810
Number of pages3088630
JournalPhysical Review C - Nuclear Physics
Volume70
Issue number3
DOIs
Publication statusPublished - Jan 1 2004

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impulses
neutrinos
approximation
cross sections
forward scattering
form factors
analogs
symmetry
scattering

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Kawabata, T., Akimune, H., Fujimura, H., Fujita, H., Fujita, Y., Fujiwara, M., ... Yosoi, M. (2004). Isovector and isoscalar spin-flip M1 strengths in11B. Physical Review C - Nuclear Physics, 70(3), 343181-3431810. [034318]. https://doi.org/10.1103/PhysRevC.70.034318

Isovector and isoscalar spin-flip M1 strengths in11B. / Kawabata, T.; Akimune, H.; Fujimura, H.; Fujita, H.; Fujita, Y.; Fujiwara, M.; Hara, K.; Hara, K. Y.; Hatanaka, K.; Ishikawa, T.; Itoh, M.; Kamiya, J.; Kishi, S.; Nakmura, M.; Nakanishi, K.; Noro, Tetsuo; Sakaguchi, H.; Shimbara, Y.; Takeda, H.; Tamii, A.; Terashima, S.; Toyokawa, H.; Uchida, M.; Ueno, H.; Wakasa, Tomotsugu; Yasuda, Y.; Yoshida, H. P.; Yosoi, M.

In: Physical Review C - Nuclear Physics, Vol. 70, No. 3, 034318, 01.01.2004, p. 343181-3431810.

Research output: Contribution to journalArticle

Kawabata, T, Akimune, H, Fujimura, H, Fujita, H, Fujita, Y, Fujiwara, M, Hara, K, Hara, KY, Hatanaka, K, Ishikawa, T, Itoh, M, Kamiya, J, Kishi, S, Nakmura, M, Nakanishi, K, Noro, T, Sakaguchi, H, Shimbara, Y, Takeda, H, Tamii, A, Terashima, S, Toyokawa, H, Uchida, M, Ueno, H, Wakasa, T, Yasuda, Y, Yoshida, HP & Yosoi, M 2004, 'Isovector and isoscalar spin-flip M1 strengths in11B', Physical Review C - Nuclear Physics, vol. 70, no. 3, 034318, pp. 343181-3431810. https://doi.org/10.1103/PhysRevC.70.034318
Kawabata T, Akimune H, Fujimura H, Fujita H, Fujita Y, Fujiwara M et al. Isovector and isoscalar spin-flip M1 strengths in11B. Physical Review C - Nuclear Physics. 2004 Jan 1;70(3):343181-3431810. 034318. https://doi.org/10.1103/PhysRevC.70.034318
Kawabata, T. ; Akimune, H. ; Fujimura, H. ; Fujita, H. ; Fujita, Y. ; Fujiwara, M. ; Hara, K. ; Hara, K. Y. ; Hatanaka, K. ; Ishikawa, T. ; Itoh, M. ; Kamiya, J. ; Kishi, S. ; Nakmura, M. ; Nakanishi, K. ; Noro, Tetsuo ; Sakaguchi, H. ; Shimbara, Y. ; Takeda, H. ; Tamii, A. ; Terashima, S. ; Toyokawa, H. ; Uchida, M. ; Ueno, H. ; Wakasa, Tomotsugu ; Yasuda, Y. ; Yoshida, H. P. ; Yosoi, M. / Isovector and isoscalar spin-flip M1 strengths in11B. In: Physical Review C - Nuclear Physics. 2004 ; Vol. 70, No. 3. pp. 343181-3431810.
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abstract = "The 11B(3He,t), and 11B(d,d′), and 11B(p,p′) reactions were measured at forward scattering angles including 0° to study the isovector and isoscalar spin-flip M1 strengths in 11B. The measured 11B(3He,t) cross sections were compared with the results of the distorted-wave impulse-approximation (DWIA) calculation, and the Gamow-Teller (GT) strengths for low-lying states in 11C were determined. The GT strengths were converted to the isovector spin-flip M1 strengths using the isobaric analog relations under the assumption of the isospin symmetry. The isoscalar spin-flip M1 strengths were obtained from the (d,d′) analysis by assuming that the shape of the collective transition form factor with the same ΔJπ is similar in the 11B(d,d′) and 12C(d,d′) reactions. The obtained isovector and isoscalar strengths were used in the DWIA calculations for the 11B(p,p′) reaction. The DWIA calculation reasonably well explains the present 11B(p,p′) result. However, the calculated cross section for the 8.92-MeV 3/22-, state was significantly smaller than the experimental values. The transition strengths obtained in the shell-model calculations were found to be 20-50 {\%} larger than the experimental strengths. The transition strengths for the neutrino induced reactions were estimated by using the isovector and isoscalar spin-flip Ml strengths. The present results are quantitatively in agreement with the theoretical estimation discussing the axial isoscalar coupling in the neutrino scattering process, and are useful in the measurement of the stellar neutrinos using the neutral- and charged-current reactions on 11B.",
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AU - Kawabata, T.

AU - Akimune, H.

AU - Fujimura, H.

AU - Fujita, H.

AU - Fujita, Y.

AU - Fujiwara, M.

AU - Hara, K.

AU - Hara, K. Y.

AU - Hatanaka, K.

AU - Ishikawa, T.

AU - Itoh, M.

AU - Kamiya, J.

AU - Kishi, S.

AU - Nakmura, M.

AU - Nakanishi, K.

AU - Noro, Tetsuo

AU - Sakaguchi, H.

AU - Shimbara, Y.

AU - Takeda, H.

AU - Tamii, A.

AU - Terashima, S.

AU - Toyokawa, H.

AU - Uchida, M.

AU - Ueno, H.

AU - Wakasa, Tomotsugu

AU - Yasuda, Y.

AU - Yoshida, H. P.

AU - Yosoi, M.

PY - 2004/1/1

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N2 - The 11B(3He,t), and 11B(d,d′), and 11B(p,p′) reactions were measured at forward scattering angles including 0° to study the isovector and isoscalar spin-flip M1 strengths in 11B. The measured 11B(3He,t) cross sections were compared with the results of the distorted-wave impulse-approximation (DWIA) calculation, and the Gamow-Teller (GT) strengths for low-lying states in 11C were determined. The GT strengths were converted to the isovector spin-flip M1 strengths using the isobaric analog relations under the assumption of the isospin symmetry. The isoscalar spin-flip M1 strengths were obtained from the (d,d′) analysis by assuming that the shape of the collective transition form factor with the same ΔJπ is similar in the 11B(d,d′) and 12C(d,d′) reactions. The obtained isovector and isoscalar strengths were used in the DWIA calculations for the 11B(p,p′) reaction. The DWIA calculation reasonably well explains the present 11B(p,p′) result. However, the calculated cross section for the 8.92-MeV 3/22-, state was significantly smaller than the experimental values. The transition strengths obtained in the shell-model calculations were found to be 20-50 % larger than the experimental strengths. The transition strengths for the neutrino induced reactions were estimated by using the isovector and isoscalar spin-flip Ml strengths. The present results are quantitatively in agreement with the theoretical estimation discussing the axial isoscalar coupling in the neutrino scattering process, and are useful in the measurement of the stellar neutrinos using the neutral- and charged-current reactions on 11B.

AB - The 11B(3He,t), and 11B(d,d′), and 11B(p,p′) reactions were measured at forward scattering angles including 0° to study the isovector and isoscalar spin-flip M1 strengths in 11B. The measured 11B(3He,t) cross sections were compared with the results of the distorted-wave impulse-approximation (DWIA) calculation, and the Gamow-Teller (GT) strengths for low-lying states in 11C were determined. The GT strengths were converted to the isovector spin-flip M1 strengths using the isobaric analog relations under the assumption of the isospin symmetry. The isoscalar spin-flip M1 strengths were obtained from the (d,d′) analysis by assuming that the shape of the collective transition form factor with the same ΔJπ is similar in the 11B(d,d′) and 12C(d,d′) reactions. The obtained isovector and isoscalar strengths were used in the DWIA calculations for the 11B(p,p′) reaction. The DWIA calculation reasonably well explains the present 11B(p,p′) result. However, the calculated cross section for the 8.92-MeV 3/22-, state was significantly smaller than the experimental values. The transition strengths obtained in the shell-model calculations were found to be 20-50 % larger than the experimental strengths. The transition strengths for the neutrino induced reactions were estimated by using the isovector and isoscalar spin-flip Ml strengths. The present results are quantitatively in agreement with the theoretical estimation discussing the axial isoscalar coupling in the neutrino scattering process, and are useful in the measurement of the stellar neutrinos using the neutral- and charged-current reactions on 11B.

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