Mixed-Spin Pairing Condensates in Heavy Nuclei
| Autor: | Gezerlis, Alexandros, Bertsch, G. F., Luo, Y. L. |
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| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Phys.Rev.Lett.106:252502,2011 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.106.252502 |
| Popis: | We show that the Bogoliubov-de Gennes equations for nuclear ground-state wave functions support solutions in which the condensate has a mixture of spin-singlet and spin-triplet pairing. We find that such mixed-spin condensates do not occur when there are equal numbers of neutrons and protons, but only when there is an isospin imbalance. Using a phenomenological Hamiltonian, we predict that such nuclei may occur in the physical region within the proton dripline. We also solve the Bogoliubov-de Gennes equations with variable constraints on the spin-singlet and spin-triplet pairing amplitudes. For nuclei that exhibit this new pairing behavior, the resulting energy surface can be rather soft, suggesting that there may be low-lying excitations associated with the spin mixing. Comment: 4+ pages, 3 figures, 1 table; 1 reference added; v2 corresponds to the published version |
| Databáze: | arXiv |
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