Theoretical Investigation of α-decay Chains of Fm-isotopes




α-decay, relativistic mean-field, preformed cluster-decay model, preformation, half-lives


Background: The theoretical and experimental investigations of decay properties of heavy and superheavy nuclei are crucial to explore the nuclear structure and reaction dynamics.

Purpose: The aim of this study is to probe the α-decay properties of 243Fm and 245Fm isotopic chains using relativistic mean-field (RMF) approach within the framework of preformed cluster-decay model (PCM).

Methods: The RMF densities are folded with the relativistic R3Y NN potential to deduce the nuclear interaction potential between the α particle and daughter nucleus. The penetration probability is calculated within the WKB approximation.

Results: The α-decay half-lives of even-odd 243Fm and 245Fm isotopes and their daughter nuclei are obtained from the preformed cluster-decay model. These theoretically calculated half-lives are found to be in good agreement with the recent experimental measurements.

Conclusions: The novel result here is the applicability of the scaling factor within the PCM as a signature for shell/sub-shell closures in α-decay studies. As such, we have also demonstrated that N=137, 139 and Z=94 corresponding to 231,233Pu could be shell/sub-shell closures. The least T1/2 is found at 243,245Fm which indicate their individual stability and α-decay as their most probable decay mode.


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How to Cite

Joshua, T. M.; Rana, S.; Jain, N.; Bhuyan, M.; Anwar, K.; Kumar, R.; Abdullah, N. Theoretical Investigation of α-Decay Chains of Fm-Isotopes. J. Nucl. Phy. Mat. Sci. Rad. A. 2022, 9, 131-136.