Entrance channels and alpha decay half-lives of the heaviest elements

Details Entrance channels and alpha decay half-lives of the heaviest elements Entrance channels and alpha decay half-lives of the heaviest elements

2004-10-12

arxiv.org/abs/nucl-th/0410048v1

Nucl.Phys. A730 (2004) 22

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

The barriers standing against the formation of superheavy elements and their consecutive $\alpha$ decay have been determined in the quasimolecular shape path within a Generalized Liquid Drop Model including the proximity effects between nucleons in a neck, the mass and charge asymmetry, a precise nuclear radius and the shell effects given by the Droplet Model. For moderately asymmetric reactions double-hump potential barriers stand and fast fission of compact shapes in the outer well is possible. Very asymmetric reactions lead to one hump barriers which can be passed only with a high energy relatively to the superheavy element energy. Then, only the emission of several neutrons or an $\alpha$ particle can allow to reach an eventual ground state. For almost symmetric heavy-ion reactions, there is no more external well and the inner barrier is higher than the outer one.

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