Probing the N = 32 shell closure below the magic proton number Z = 20: Mass measurements of the exotic isotopes 52,53K

Autor:	Rosenbusch, M., Ascher, P., Atanasov, D., Barbieri, C., Beck, D., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Cakirli, R. B., Cipollone, A., George, S., Herfurth, F., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Navrátil, P., Neidherr, D., Schweikhard, L., Somà, V., Stanja, J., Wienholtz, F., Wolf, R. N., Zuber, K.
Rok vydání:	2015
Předmět:	Nuclear Experiment Nuclear Theory
Zdroj:	Phys. Rev. Lett. 114, 202501 (2015)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.114.202501
Popis:	The recently confirmed neutron-shell closure at N = 32 has been investigated for the first time below the magic proton number Z = 20 with mass measurements of the exotic isotopes 52,53K, the latter being the shortest-lived nuclide investigated at the online mass spectrometer ISOLTRAP. The resulting two-neutron separation energies reveal a 3 MeV shell gap at N = 32, slightly lower than for 52Ca, highlighting the doubly-magic nature of this nuclide. Skyrme-Hartree-Fock-Boguliubov and ab initio Gorkov-Green function calculations are challenged by the new measurements but reproduce qualitatively the observed shell effect. Comment: 5 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1506.00520 Zobrazit plný text záznamu View this record from Arxiv