セミナー(2016.7.25)：Nicolae Sandulescu氏 (NIPNE)
2016年6月23日 | 新着情報
7月25日（月）13:30より、Sandulescu氏（National Institute of Physics and Nuclear Engineering, ルーマニア）による以下のセミナーを筑波大において開催します。
Date: July 25th (Mon), 13:30-
Place: B602, Institute of Natural Sciences (自B602)
Lecturer: Nicolae Sandulescu (National Institute of Physics and Nuclear Engineering, Bucharest, Romania)
Title: Proton-neutron pairing and quartet correlations in nuclei
Abstract: The common treatment of proton-neutron pairing in N≅Z nuclei relies on Cooper pairs and mean-field BCS-type models. However, for any spin-singlet (S=0) and spin-triplet (S=1) pairing interactions the ground state of N=Z nuclei is accurately described not by Cooper pairs but in terms of quartets [1-3]. Moreover, quartets remain relevant degrees of freedom for more general two-body interactions than pairing, indicating that quartetting is in fact a general feature in N=Z nuclei [4]. Using a formalism of quartets, I will discuss the competition between T=0 and T=1 pairing in N=Z nuclei [1-3], the effect of proton-neutron pairing on Wigner energy [5] and the role of isoscalar spin-aligned pairs in 92Pd [6] .
[1] N. Sandulescu, D. Negrea, D. Gambacurta, Phys. Lett. B751 348 (2015)
[2] M. Sambataro, N. Sandulescu, C.W. Johnson, Phys. Lett. B770,137 (2015)
[3] M. Sambataro and N. Sandulescu, Phys. Rev. C93, 054320 (2016)
[4] M. Sambataro and N. Sandulescu, Phys. Rev. Lett. 115, 112501 (2015)
[5] D. Negrea and N. Sandulescu, Phys. Rev. C90, 024322 (2014)
[6] M. Sambataro and N. Sandulescu, Phys. Rev. C91, 064318 (2015)