The fission barriers standing in the quasi-molecular shape path have been determined within a generalized liquid drop model taking into account the nuclear proximity energy, the mass and charge asymmetry and an accurate nuclear radius. The barrier heights agree with the experimental symmetric and asymmetric fission barrier heights. The half-lives of the alpha and light nucleus decay and cluster radioactivity are reproduced within a tunneling process through these barriers. Rotating highly deformed states exist in this path. The entrance and exit channels governing the superheavy nucleus formation and decay have been investigated.
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