Alpha particle clusters and their condensation in nuclear systems

作者：Schuck, Peter; Funaki, Yasuro^*; Horiuchi, Hisashi; Ropke, Gerd; Tohsaki, Akihiro; Yamada, Taiichi

来源：Physica Scripta, 2016, 91(12): 123001.

DOI：10.1088/0031-8949/91/12/123001

• alpha cluster
• THSR wave function
• alpha condensation

In this article we review the present status of a clustering in nuclear systems. First of all, an important aspect is condensation in nuclear matter. Like for pairing, quartetting in matter is at the root of similar phenomena in finite nuclei. Cluster approaches for finite nuclei are shortly recapitulated in historical order. The a container model, recently been proposed by Tohsaki-Horiuchi-Schuck-Ropke (THSR), will be outlined and the ensuing condensate aspect of the Hoyle state at 7.65 MeV in C-12 is investigated in some detail. A special case will be made with respect to the very accurate reproduction of the inelastic form factor from the ground to Hoyle state with the THSR description. The extended volume will be deduced. New developments concerning excitations of the Hoyle state will be discussed. After 15 years since the proposal of the a condensation concept a critical assessment of this idea will be given. Alpha gas states in other nuclei like O-16 and C-13 will be considered. An important aspect is the experimental evidence, both present and future ones. The THSR wave function can also describe configurations of one a particle on top of a doubly magic core. The cases of Ne-20 and Po-212 will be investigated.

• 出版日期2016-12
• 单位RIKEN; 北京航空航天大学