Half-lives and fragments of spontaneous fission of superheavy elements

Abstract

The isotopic yield and half-lives of the spontaneous fission of superheavy nuclei [Formula: see text] and [Formula: see text] are studied. First, the theoretical formalism is validated by applying it to known isotopes of superheavy nuclei which can undergo spontaneous fission. Half-lives obtained from this work indicate that all the half-lives are approximately twice when compared to experimental measurements. Thereafter, we explored the isotopic yield and half-lives of spontaneous fission for the superheavy nuclei [Formula: see text] and [Formula: see text] by studying the driving potential, yield and penetration probability. The superheavy nuclei [Formula: see text] can undergo alpha decay up to [Formula: see text]. Thereafter they undergo spontaneous fission. Similarly, the superheavy nuclei [Formula: see text] undergo spontaneous fission beyond A=309. It is observed that the superheavy nuclei [Formula: see text] undergo spontaneous fission through the fission fragment combination of Sn+Tm, however, the superheavy nuclei [Formula: see text] undergo spontaneous fission with the fragments Sn+Yb. The larger spontaneous half-life is of the order of ns from the superheavy nuclei [Formula: see text]119 and [Formula: see text]120. Further investigations were required in the evaluation of the anticipated fission fragment combinations and half-lives of [Formula: see text]119 and [Formula: see text]120.