Cluster radioactivity in superheavy nuclei 299-306122

H C Manjunatha,N Sowmya,S Alfred Cecil Raj,A M Nagaraja

doi:10.15415/jnp.2020.81007

H C Manjunatha, N Sowmya + Show 2 more

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https://doi.org/10.15415/jnp.2020.81007

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Abstract

Cluster radioactivity is an intermediate between alpha decay and spontaneous fission. It is also an exotic decay obtained in superheavy nuclei. When a cluster decay is detected in superheavy nuclei, the daughter nuclei is having near or equal to doubly magic nuclei. We have investigated cluster decay of isotopes of He, Li, Be, Ne, N, Mg, Si, P, S, Cl, Ar and Ca in the superhaevy nuclei region 299-306122. We have also compared the logarithmic half-lives of cluster decay with that of other models such as Univ [1], NRDX [2], UDL [3] and Horoi [4]. From this study it is concluded that cluster decay of 4He, 22Ne, 26Mg, 28Si 30Si, 34S, 40Ca and 46Ca are having shorter logarithmic half-lives compared to exotic cluster decay modes.

Highlights

IntroductionPrevious workers [14,15] studied alpha decay half-lives of super-heavy region using generalized liquid-drop model (GLDM) and density-dependent cluster model
Cluster radioactivity is an intermediate process between alpha decay and spontaneous fission
UNIV Formula: Poenaru et al, [1] derived single line of universal (UNIV) curve for alpha and cluster decay by plotting the sum of the decimal logarithm of the half-life and cluster preformation probability versus the decimal logarithm of the penetrability of external barrier. This formula is referred as UNIV formula it is expressed as, The amount of energy released from the cluster decay such as 4He, 6Li, 9Be, 12C, 14N, 20,22Ne, 23N, 24-26Mg, 28-30Si, 31P, 32-34S, 35Cl, 36,38,40Ar, and 40-46Ca are studied using mass excess values available in the reference [54]

Summary

Introduction

Previous workers [14,15] studied alpha decay half-lives of super-heavy region using generalized liquid-drop model (GLDM) and density-dependent cluster model. UNIV Formula: Poenaru et al, [1] derived single line of universal (UNIV) curve for alpha and cluster decay by plotting the sum of the decimal logarithm of the half-life and cluster preformation probability versus the decimal logarithm of the penetrability of external barrier This formula is referred as UNIV formula it is expressed as, The amount of energy released from the cluster decay such as 4He, 6Li, 9Be, 12C, 14N, 20,22Ne, 23N, 24-26Mg, 28-30Si, 31P, 32-34S, 35Cl, 36,38,40Ar, and 40-46Ca are studied using mass excess values available in the reference [54]. Formula for alpha and cluster decay half-lives from the WKB barrier penetration probability with certain approximations

The proposed formula is log

Cluster emission

Conclusions