Study on the decay of Z = 127 – 132 superheavy nuclei via emission of 1-n and 2-n halo nuclei

The barrier penetrability, decay constant and decay half-life of 1-n halo nuclei ¹¹Be, ¹⁵,¹⁷,¹⁹C, ²²N, ²³O, ²⁴,²⁶F, ²⁹,³¹Ne, ³⁴,³⁷Na, ³⁵,³⁷Mg, and ⁵⁵Ca; and 2-n halo nuclei ²²C, ²⁷,²⁹F, ³⁴Ne, ³⁶Na, and ⁴⁶P from Z = 127 – 132 parents were calculated within the framework of the Coulomb and proximity potential model by calculating the Q-values using the finite-range droplet model. A comparison between the decay half-lives is made by considering the halo candidates as a normal cluster and as a deformed structure with a rms radius. Neutron shell closure at 190, 196, 198, 200, 204, and 208 are identified from the plot of decay half-lives versus the neutron number of daughter nuclei (N_p). The calculation of alpha decay half-life and spontaneous decay half-life showed that the majority of the parent nuclei survive spontaneous fission and decay through alpha emission. The Geiger - Nuttall plots of log₁₀ T_{1/ 2} versus Q ^{− 1/2} and universal plots of log₁₀ T_1/2 versus − ln P for the emission of all 1-n and 2-n halo nuclei from the parents considered here are linear and show the validity of Geiger - Nuttall law in the case of decay of halo nuclei from superheavy elements. (author)