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Influence of the Pairing Interaction on the Nuclear Energy Level Density
並列摘要
The modern theory of superconductivity developed by BCS and BZT is employed to examine the pairing interaction on the nuclear energy level density. A statistical model of nucleus is assumed to obtain the over-all character of the excited states. The empirical formula for the pairing energy proposed by Nemirovsky and Adamchuck and the semi-empirical formula for the single particle level density proposed by Abdelmaleck and Stavinsky are used to calculate the transition temperature, excitation energy, entropy, specific heat and the total level density. Except for the extremely light and heavy nuclei, a phase transition is predicted all at anenergy of 2.73 Mev or so for a wide range of the mass number. This is remarkabIy different from the one calculated by Sano and Yamasaki. The level density below the transition energy is far smaller than that expected on extropolating it from the higher energy side.
並列關鍵字
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