α-decaying excited states in carbon and boron isotopes

Be-αcorrelations in the linear-chain structure of C isotopes

“…For excited states of 14 C, there exist many experimental works suggesting the 10 Be+α cluster structure in the observed excited states above the 10 Be+α threshold [17,[20][21][22][23]. We expect that these states might be possible candidates for the linear-chain states.…”

Cluster structures of excited states inC14

“…In this point of view, neutron-rich C isotopes such as 14 C are an interesting subject because they have excess neutrons compared with 12 C, which is already well known to show various structures owing to the coexistence of shell-model and cluster features. The ground state of 12 C has mainly a shell-model feature of the p 3/2 -subshell closed configuration, whereas, in the excited states above the 3α threshold energy, various configurations of 3α-cluster structures were suggested in many theoretical works [1][2][3][4][5][6][7][8][9][10][11].…”

“…Moreover, a linear chainlike structure with an obtuseangle-triangular 3α configuration was suggested in the 0 + 3 state [9,10]. Therefore, it is expected that 14 C with two excess neutrons may also exhibit rich phenomena in the excited states. In particular, from an analogy of 12 C, various cluster structures may appear in 14 C as well as shell-model structures.…”

“…Therefore, it is expected that 14 C with two excess neutrons may also exhibit rich phenomena in the excited states. In particular, from an analogy of 12 C, various cluster structures may appear in 14 C as well as shell-model structures.…”

“…For the excited states of 14 C, there are many experimental studies that indicate the appearance of cluster states such as 10 Be + α cluster states [12][13][14][15][16]. Also on the theoretical side, cluster structures of 14 C were suggested [17].…”