Süper-ağır çekirdeklerin kendiliğinden fisyon yarı ömürlerinin farklı modellerdeki hesaplamaları

Abstract

The spontaneous fission (SF) is a key decay energetically feasible for heavy and superheavy nuclei (Z≥90) and it is an important limiting factor which describes the stability of synthesized superheavy nuclei. Since the fission decay is complex, it is difficult to explain such a multi-dimensional system in a complete microscopic manner. In this study, SF half-lives of 284Cn and 284Fl superheavy nuclei are investigated using the direct method, the Universal Decay Law (UDL). The fission decay constant for each possible case is computed by using the UDL and then the SF half-life for 284Cn and 284Fl superheavy nuclei are predicted. The calculated SF half-lives are compared with the results of other semi-empirical formulas as well as experimental data. Furthermore, the results are compared with ones of the model in which they proposed this direct method for the SF by using nuclear proximity and Coulomb potentials. Good agreement is achieved between the results of this approach and the others. This study shows that UDL would also be used in the half-lives calculations of Spontaneous Fission of superheavy nuclei in a direct way.