Existence of 15-21N, 17-23O, and 19-25F Neutron Halo Nuclei via Cluster Decay Process in the Superheavy Region

Theoretical Study on the Formation of 1-neutron and 2-neutron Halo Nuclei via Decay of Elements in Super-Heavy Region

“…From Figure 1, it is clear that in the case of 29,31 Ne, the (V -Q) is minimum for the 1n + core configuration. Similarly, Figures 2 to 5; shows that for 34 Na, 37 Na, 37 Mg and 55 Ca have also the 1n + core configuration has the deepest minimum corresponding to the most probable configuration. Hence, they can be considered as candidates for 1n-halo nuclei.…”

“…These are tabulated and given in table 1. On the basis of our calculation of S(n), the possible 1n-halo candidates in the region Z = 10 -20 are 29 Ne, 31 Ne, 36 Na, 37 Na, 35 Mg, 37 Mg, 46 P and 55 Ca. The isotopes of Z = 10 -20 nuclei showed a lower 2n-separation energy than 1n-separation energy only for 34 Ne and can be considered as a candidate for 2n-halo.…”

“…This is evident from the fact that almost all reported halo nuclei have an s-wave halo structure. Only a very few nuclei such as 31 Ne, 34 Na and 37 Mg exhibit p-wave halo structure [24,55,56].This is also evident from the fact that the formation of neutron halo in many nuclei such as 11 Be, 14 Be, 22 N, 23 O and 24 F etc., depends directly on the occupation of outer electrons in the 2S 1/2 state [57]. Therefore, we feel that such shifting will not have much effect on the probability for the formation of the halo structure.…”

“…Even though the S(n) of 40 P is lower than its S(2n), it can be considered as a 2n-halo since it has a minimum at 2n +core configuration. Therefore, the 2-n halo candidates are 34 Ne, 36 Na and 40 P. From the plot of driving potential, in the case of 29 Ne, 31 Ne and 37 Mg, we can see that with the increase in the angular momentum quantum number (l ), the 1n + core configuration is shifted to 2n + core configuration This kind of changes are observed when the ground state spin and parity of the decays are not conserved [33]. The spin and parity of 24 Na , However, the halo nuclei prefer the lowest angular momentum state (l = 0) since large angular momentum will give rise to a centrifugal potential that would tend to confine the nucleons [7].…”

“…The model can be used for accurate predictions of alpha decay chains [35,36] and heavy particle decays from heavy and superheavy elements [35]. The model has been modified for deformed nuclei by considering the quadrupole, octupole and hexadecapole deformations and is used to study the effect of deformation on the half-life of decay [37].…”