$2α+t$ cluster structure in $^{11}$B

T. Kawabata; H. Akimune; H. Fujita; Y. Fujita; M. Fujiwara; K. Hara; K. Hatanaka; M. Itoh; Y. Kanada-En'yo; S. Kishi; K. Nakanishi; H. Sakaguchi; Y. Shimbara; A. Tamii; S. Terashima; M. Uchida; T. Wakasa; Y. Yasuda; H. P. Yoshida; M. Yosoi

doi:10.1016/j.physletb.2006.11.079

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$2α+t$ cluster structure in $^{11}$B

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Abstract

The cluster structures of the excited states in $^{11}$B are studied by analyzing the isoscalar monopole and quadrupole strengths in the $^{11}$B($d$,$d'$) reaction at $E_d=200$ MeV. The excitation strengths are compared with the predictions by the shell-model and antisymmetrized molecular-dynamics (AMD) calculations. It is found that the large monopole strength for the $3/2^-_3$ state at $E_x=8.56$ MeV is well described by the AMD calculation and is an evidence for a developed $2α+t$ cluster structure.

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T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-En'yo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi. 2006-09-28. $2α+t$ cluster structure in $^{11}$B. https://doi.org/10.1016/j.physletb.2006.11.079

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