Nuclear Binding Mechanism and Structure of Neutron-Rich Be and B Isotopes by Molecular-Orbital Model

Impurity effects of theΛparticle on the2αcluster states ofBe9andIsaka1, Kimura2 2015Phys. Rev. C22190View full textAdd to dashboardCite

“…From the above point of view, structure of Be hyperisotopes is particularly of interest, since Be isotopes have 2α cluster core surrounded by valence neutrons [25][26][27][28][29][30]. For example, in 9 Be, the first excited state 1/2 + is considered to have 8 Be(0 + ) + n(s 1/2 ) configuration, which can be regarded as a Hoyle analogue state with the replacement of a α particle by a neutron, while the ground state has a relatively compact structure with 8 Be(0 + ) + n(p 3/2 ) configuration.…”

6He-triton cluster states in9Li

“…Many of low-lying states of Be isotopes are understood in a molecular orbital picture where a Be nucleus is considered to consist of 2 α's and valence neutron(s) in molecular orbitals around the 2α core [1][2][3][4][5][6][7][8][9][10][11][12][13]. In highly excited states near the He+He threshold energy of 10 Be and 12 Be, well-developed cluster states have been suggested experimentally and theoretically [7,[12][13][14][15][16][17][18][19][20].…”

Cluster formation, breaking, and excitation in light nuclei

“…In the ground state of 10 Be, the 2α cluster structure weakens because of the two excess neutrons compared with the 2α cluster structure developed in 8 Be. In the 0 + 2 state, two α clusters develop well, and excess neutrons move in the longitudinal molecular orbitals, the so-called σ orbitals around 2α [27][28][29]. In the 0 + 2 state, two α clusters are bonded by valence neutrons at a certain distance and construct the rotational band (Fig.…”