Spontaneous fission half lives of heaviest nuclei with Woods-Saxon potential

In this paper adapting the realistic single-particle Woods-Saxon potential the spontaneous half- lives of elements with Z≥ 104 are estimated. All even- even, odd-even and odd-odd nuclei are considered. In calculations of spontaneous fission half lives phenomenological mass parameters are applied. The results allow to estimate hindrance factors for odd systems. As compared to calculations with Nilsson model and microscopic mass parameters, present results for spontaneous fission half lives are 3-5 orders of magnitude higher in the case of heaviest nuclei (Z ≥ 107)