Theoretical Study on Spontaneous Fission of Actinides

The spontaneous fission half-lives of the actinides are calculated by the WKB approximation and the potential barriers are constructed by a General Liquid Drop Model(GLDM) including the proximity energy,the mass and charge asymmetry,and an accurate nucleus radius.The microscopic shell correction which plays a key role for the spontaneous fission barrier is considered for the first time.The two-parameter quasi-molecular shape and the proximity are described in details within the GLDM.The effects of the microscopic shell correction and proximity energy for fission barrier are discussed separately.The calcula-ted spontaneous fission half-lives for the actinides reasonably accord with the experimental data,implying the present GLDM combined with the microscopic shell correction can be used to study the spontaneous fission properties of heavy nuclei successfully.