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Abstract

The liquid drop energy and barrier height are calculated for the super heavy nuclei 250X and 251X, resulting from heavy ion reactions, at finite temperatures. Our calculations are compared with both the idealized nuclei 250Es and 251 Es (being isobars of 250X and 251X) and that obtained by previous work. The main reason of the descrepancies between the present calculated values of the barrier height and the fissility parameters and those obtained by others are found to be mainly due to the important role of Coulomb energy over the surface energy for heavy nuclei. It has been found that the temperature has the effect lowering the fission barrier and shifting the saddle point to lower values.

Die Deformationsenergie und Barrierenhöhe bei superschweren Kernen

Am Beispiel der Atomkerne 250X und 251X, 250Es, 251Es aus Schwerionen-reaktionen werden die Energie des Tropfens und die Barrierenhöhe für endliche Temperaturen berechnet. Es erweist sich eine Dominanz der Coulombenergie über die Oberflächenenergie. Die Steigerung der Temperatur führt zu einer niedrigeren Spaltungsbarriere und verschiebt den Sattelpunkt zu kleineren Werten.