Experimental First Order Pairing Phase Transition in Atomic Nuclei. (9th February 2015)

• Record Type: Journal Article
• Authors: Moretto, L G; Larsen, A C; Giacoppo, F; Guttormsen, M; Siem, S
• Is Part Of: Journal of physics. Number 580(2015)
• Page Start: 012048
• Publication Date: 2015-02-09
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/580/1/012048
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The natural log of experimental nuclear level densities at low energy is linear with energy. This can be interpreted in terms of a nearly 1st order phase transition from a superfluid to an ideal gas of quasi particles. The transition temperature coincides with the BCS critical temperature and yields gap parameters in good agreement with the values extracted from even- odd mass differences from rotational states. This converging evidence supports the relevance of the BCS theory to atomic nuclei.