Speakers
Description
The alpha (α) emission is one of the prominent ground state decay mechanism, which is used as investigating tool to understand the relative stability of a nuclear isotopes. In last few decades, many experimental and theoretical attempts were made to understand the cluster-core interplay of radioactive nuclei. The preformed cluster model (PCM) [1,2] have successfully explored α-particle and other ground state decay modes in recent years. In this methodology, cluster is supposed to be preformed inside the mother nucleus and the preformation probability of decaying fragment serves as an important tool to investigate the half-life and the decay constant. The relative stability of a nucleus depends on the decay constant which is the product of three factors such as assault frequency (ν0), penetration probability (P) and the preformation probability (P0). In this work, we have used the classical and quantum mechanical assault frequency in reference to [3]. Classically, it is considered that alpha particle move back and forth inside the nucleus. In the quantum mechanical approach the alpha particle is considered to be vibrating near the surface of parent nucleus, under the influence of harmonic oscillator potential. A comparative study is carried out for the alpha decay of Polonium (Po) isotopes (having mass AP=188-218) within the framework of PCM. The fragmentation potential, preformation probability and penetration probability of considered Po isotopes are investigated. The relevant role of proton (Z) and neutron (N) magic shell closures of the daughter nuclei is worked out. The PCM calculated α-decay half-lives are calculated using both assault frequency approaches and compared with the available experimental data [4].
