A Systematic Study on the Existence of 7-9B, 16-19Ne, 8-11C, 23-30P and 26-32S Nuclei via Cluster Decay in the Super Heavy Region

Abstract

Based on the Coulomb and Proximity Potential Model, we have studied the decay probabilities of various exotic nuclei from even-even nuclei in the super heavy region. The half-lives and barrier penetrability for the decay of exotic nuclei such as 7-9 B, [16][17][18][19][8][9][10][11][23][24][25][26][27][28][29][30] S from the isotopes 116, 274-334 118 and 288-334 120 are determined by considering them as spherical as well as deformed nuclei. The effect of ground state quadrupole (β 2 ), Octupole (β 3 ) and hexadecapole (β 4 ) deformation of parent, daughter and cluster nuclei on half-lives and barrier penetrability were studied. Calculations have done for the spherical nuclei and deformed nuclei in order to present the effects of the deformations on half-lives. It is found that height and shape of the barrier reduces by the inclusion of deformation and hence half-life for the emission of different clusters decreases and barrier penetrability increases. Changes in the half-lives with and without the inclusion of deformation effects are compared in the graph of half-life and barrier penetrability against neutron number of parents. It is evident from the computed half lives that many of the exotic nuclei emissions are probable. Moreover shell structure effects on the half-lives of decay are evident from these plots. Peak in the plot of half-life and dip in the plot of barrier penetrability against neutron number of parent show shell closure at or near to N=184, N=200 and N=212.