Two-dimensional sequence of shapes for cold-fission of264Fm |
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| Authors: | R A Gherghescu D N Poenaru W Greiner |
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| Institution: | 1. Institut für Theoretische Physik der Universit?t, Pf. 111932, D-60054, Frankfurt am Main, Germany
2. Institute of Atomic Physics, P. O. Box MG-6, RO-76900, Bucharest, Romania
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| Abstract: | The neutron-rich264Fm should be the best cold-fissioning nucleus, owing to the strong shell effect of the doubly magic fragments132Sn. The optimum cold fission path in the plane of two independent shape coordinates, the separation distanceR and of the radius of the light fragmentR 2, is determined. Werner-Wheeler inertia tensor and Yukawa-plus-exponential deformation energy are used to calculate the action integral. Microscopic shell and pairing corrections are based on the asymmetric two-center single-particle model. Different variation lawsR 2=R 2(R), for the fission trajectory were tested: polynomials of 2nd, 3rd, and 4th degree and an exponential function. The partial half-life for cold fission is estimated to be several orders of magnitude shorter than that of α-decay. |
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