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

K P Anjali K P Anjali,R K Biju R K Biju,K Prathapan K Prathapan,K P Santhosh K P Santhosh

doi:10.15415/jnp.2019.71001

K P Anjali K P Anjali, R K Biju R K Biju + Show 2 more

Open Access

https://doi.org/10.15415/jnp.2019.71001

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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 7-9B, 16-19 Ne, 8-11 C, 23-30 P and 26-32 S from the isotopes 274-332116,274-334 118 and 288-334120 are determined by considering them as spherical as well as deformed nuclei. The effect of ground state quadrupole (β2), Octupole (β3) and hexadecapole (β4) 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 barrierpenetrability 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 halflife 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.

Highlights

Theoretical and experimental studies of unbound exotic nuclei near drip lines constitute one of the promising areas of research in nuclear physics, and many hundreds of studies have done since its discovery in mid-1980s [1]
Proton halos are further observed as one proton halo and two proton halo structures
Stability of the parent nuclei can be studied by the computation of half-life, and barrier penetrability

Summary

Introduction

Theoretical and experimental studies of unbound exotic nuclei near drip lines constitute one of the promising areas of research in nuclear physics, and many hundreds of studies have done since its discovery in mid-1980s [1]. 23-30P, S 26-32 from even-even super heavy isotopes 274-332116, 274-334118, 288-334120 with and without the inclusion of deformation effect using Coulomb and Proximity Potential Model [63,64,65,66,67] In addition with this we would like to point out that most of the exotic nuclei belong to proton halo structure. CPPM is an effective model for the study of cluster radioactivity and half lives for the various mass regions on the nuclear chart It can be used as the interacting barrier to study the decay probabilities of proton halo nuclei from different even-even parent isotopes. In this work the model (CPPM) is modified by incorporating the deformation effects (β2, β3 and β4) for parent, daughter and cluster and the effect of deformations (β2, β3 and β4) on half-lives and barrier penetrability are studied

The Model

Results and Discussion

Conclusions