2008/06/11 by Nguyen Dinh Dang, N. Dinh Dang, Nguyễn Quang Hưng +1
Engineering · Physics and Astronomy · #Angular momentum #BCS theory #Condensed matter physics #Cooper pair #Coupling (piping) #Materials science #Momentum (technical analysis) #Nuclear physics research studies #Pairing #Physics #Quantum electrodynamics #Quantum mechanics #Quasiparticle #Random phase approximation #Rare-earth and actinide compounds #Superconducting Materials and Applications #Superconductivity #Thermal #Thermodynamics #nucl-th
paper · pdf · doi:10.1142/s0218301308011276
4 pages, 1 figure, To appear in the Proceedings of the First Workshop on State of the Art in Nuclear Cluster Physics, Strasbourg 13 - 16 May, 2008
arxiv created 2008/06/11 · openalex publication_date 2008/11/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
An approach is proposed to nuclear pairing at finite temperature and angular momentum, which includes the effects of the quasiparticle-number fluctuation and dynamic coupling to pair vibrations within the self-consistent quasiparticle random-phase approximation. The numerical calculations of pairing gaps, total energies, and heat capacities are carried out within a doubly folded multilevel model as well as several realistic nuclei. The results obtained show that, in the region of moderate and strong couplings, the sharp transition between the superconducting and normal phases is smoothed out, causing a thermal pairing gap, which does not collapse at a critical temperature predicted by the conventional Bardeen-Cooper-Schrieffer's (BCS) theory, but has a tail extended to high temperatures. The theory also predicts the appearance of a thermally assisted pairing in hot rotating nuclei.