Toward a Standard Model for Medium to Heavy Mass Nuclei

“中等到大质量原子核的标准模型”我们目前对原子核结构的认识仍然很不完整，因为它主要植根于β稳定线附近的核的性质(中子数与质子数之比相当接近1的核)。正因为如此，由于对原子核的理解有着广泛的应用范围，包括宇宙学和天体物理学，奇异的稀有同位素物理学已经成为美国和世界范围内的首要研究重点之一。为了配合目前世界各地新的稀有同位素加速器的发展，本理论项目的目标是发展一个完全微观的中质量到大质量原子核模型。实现这样一个长期的核结构目标是非常紧迫的，因为目前最好的多体方法在应用于具有大量过剩中子的未知中等质量同位素时很难预测。在该项目的几个重要特征中，我们的目标是更好地理解富中子态环境对核子-核子相互作用所带来的改变。这是准确描述中等质量丰中子核的关键元素，而中等质量丰中子核对于揭示宇宙中的核合成场景是最有意义的。

"A standard model for medium to heavy-mass nuclei"Our current knowledge of the structure of atomic nuclei is still far fromcomplete as it is mainly rooted on the properties of nuclei in the vicinityof the line of beta stability (nuclei with a ratio of neutron number overproton number reasonably close to one). For that reason and because theunderstanding of nuclei has a broad range of application, includingCosmology and Astrophysics, the physics of exotic rare isotopes has becomeone of the top research priorities both in the U.S. and worldwide.In order to accompany the present development of new rare-isotopesaccelerators around the world, the goal of the present theoretical projectis to develop a fully microscopic model of medium to heavy-mass nuclei. Itis quite urgent to realize such a long-term goal of nuclear structure sincecurrent best many-body methods are hardly predictive when applied to unknownmedium-mass isotopes with a large excess of neutrons. Among severalimportant features of the project, our goal is to achieve a betterunderstanding of the modifications brought about by the presence of aneutron-rich environment to the nucleon-nucleon interaction. This is a keyelement to describe accurately medium-mass neutron-rich nuclei which are ofprime interest to unreveal nucleo-synthesis scenarii in the universe.