文章基本信息

标题：Experimental nuclear level densities and interpretation within the microcanonical ensemble
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作者：M. Guttormsen ; U. Agvaanluvsan ; R. Chankova, A.C.,Larsen 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2006
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Statistical properties of atomic nuclei are studied as function of the number of neutrons. The experimental method is based on particle-g coincidences measured in light-ion reactions with one charged ejectile. From particle-g coincidences, level densities and radiative strength functions can be simultaneously extracted from one and the same data set. Mid-shell nuclei show significant odd-even entropy differences interpreted as the single-particle entropy of the valence nucleon. However, these properties change when approaching closed shells. A model within the framework of the microcanonical ensemble is presented and compared with data from the molybdenum isotopes. The odd-even entropy difference disappears in the vicinity of the N =50 shell, and an overshoot of positive parity states is predicted.