Improved empirical formula for spontaneous fission half-lives

The spontaneous fission (SF) half-lives of all 96 experimentally accessible SF emitters were examined. The SF emitters are classified as even Z-even A, odd Z-even A, odd Z-odd A and even Z-odd A. A plot of Formula: see text versus Formula: see text demonstrates a straight line, where k is variable. The Formula: see text values produced in this study are compared to all other semi-empirical relations such as Ren et al., Nucl. Phys. A 759, 64 (2005), Xu et al., Phys. Rev. C 78, 044329 (2008), Santhosh et al., Nucl. Phys. A 832, 220 (2010) and Karpov et al., Int. J. Mod. Phys. E 21, 1250013 (2012) available in the literature. When compared to earlier semi-empirical equations accessible in the literature, the new formula shows reduced uncertainty in standard deviation in the case of Odd Z-even A and even Z-Odd A nuclei. When compared to other sets of combinations (even Z-even A, and odd Z-odd A nuclei), this study more accurately reproduces the experimental SF half-lives for even Z-odd A and odd Z-even A nuclei with smaller Formula: see text in the atomic number range 9Formula: see text12 and mass number range 23Formula: see text84.