Lifetime of the isomeric 02+ state in 12Be

Studies of Light Neutron-Excess Systems from Bounds to Continuum

“…1 means that the cluster structures can change from level to level, and various cluster configuration coexist with a small energy interval of about 1∼2 MeV in 12 Be. Cluster Ex.…”

“…In contrast to the situation of theoretical studies, recent experiments on 12 Be revealed the existence of many resonant states [2][3][4], which strongly decay into 6 In the present study, we investigate the structural changes appearing in an unbound region of even Be itotopes. In order to investigate the continuum states above the particle decay threshold, the intrinsic structures and their coupling to the scattering states should be treated in a unifie manner.…”

“…In 12 Be, various excited-0 + states, such as the covalent states (0 + 1 , 0 + 2 ), the ionic states (0 + 3 , 0 + 6 ), the atomic state (0 + 4 ) and the covalent-atomic hybrid state (0 + 5 ), appear with small energy spacings (∼1∼2 MeV), as shown in Fig. 1.…”

“…[5][6][7], and we briefl show the formulation of GTCM in the following. In GTCM, the total wave function of 12 Be is given by the superposition of the basis {Φ J π K m (S )}, where,…”

“…Furthermore, it becomes possible to describe both the formation of the covalent MO structures and the reaction process induced by the collision of the ionic state. In 12 Be for instance, this model can handle the formation of an atomic structure of 6 He+ 6 He, a e-mail: itomk@kansai-u.ac.jp ionic structures of α+ 8 He and 5 He+ 7 He, and covalent MO structures in a consistent manner. In this report, we mainly investigate the intrinsic structure of 12 Be and reaction process induced by α+ 8 He slow collision, and such investigations are extended to even Be isotope of 8,10,12,14,16 Be.…”