Validation of the Be ground-state molecular structure using Be()He triple differential reaction cross-section measurements

Li, P. J.*; Beaumel, D.*; Lee, J.*; Assi, M.*; Chen, S.*; Franchoo, S.*; Gibelin, J.*; Hammache, F.*; Harada, T.*; Kanada-En'yo, Yoshiko*; Kubota, Yuki*; Leblond, S.*; Liang, P. F*; Lokotko, T.*; Lyu, M.*; Marqus, F. M.*; Matsuda, Yohei*; Ogata, Kazuyuki*; Otsu, Hideaki*; Rindel, E.*; Stuhl, L.*; Suzuki, Daisuke*; Togano, Yasuhiro*; Tomai, Takato*; Xu, X. X.*; Yoshida, Kazuki   ; Zenihiro, Juzo*; Achouri, N. L.*; Aumann, T.*; Baba, Hidetada*; Cardella, G*; Ceruti, S.*; Stefanescu, A. I.*; Corsi, A.*; Frotscher, A.*; Gao, J.*; Gillibert, A.*; Inaba, K.*; Isobe, Tadaaki*; Kawabata, Takahiro*; kitamura, N.*; Kobayashi, T.*; Kondo, Yosuke*; Kurihara, A.*; Liu, H. N.*; Miki, H.*; Nakamura, Takashi*; Obertelli, A.*; Orr, N. A.*; Panin, V.*; Sasano, Masaki*; Shimada, T.*; Sun, Y. L.*; Tanaka, Junki*; Trache, L.*; Tudor, D.*; Uesaka, Tomohiro*; Wang, H.*; Yamada, H.*; Yang, Z. H.*; Yasuda, M.*

The cluster structure of the neutron-rich isotope Be has been probed via the () reaction. The triple differential cross-section was extracted and compared to distorted-wave impulse approximation reaction calculations performed in a microscopic framework using the Tohsaki-Horiuchi-Schuck-Rpke wave function and the wave function deduced from Antisymmetrized Molecular Dynamics calculations. The remarkable agreement between calculated and measured cross-sections in both shape and magnitude validates the description of the Be ground-state as a rather compact nuclear molecule.