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Proton-neutron pairing and quartet correlations in nuclei by Prof. Nicolae Sandulescu (National Institute of Physics and Nuclear Engineering, Bucharest, Romania)
RIBF conference hall
RIBF conference hall
=Date and Place=
July 29th Friday, RIBF conference hall
Prof. Nicolae Sandulescu
(National Institute of Physics and Nuclear Engineering, Bucharest, Romania)
Proton-neutron pairing and quartet correlations in nuclei
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 . 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  and the role of isoscalar spin-aligned pairs in 92Pd .
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)