Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643 Tc

Garnsworthy, A.B., Regan, P.H., Cáceres, L., Pietri, S., Sun, Y., Rudolph, D., Górska, M., Podolyák, Zs., Steer, S.J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grëbosz, J., Kelic, A., Kojouharov, I., Kurz, N., Montes, F., Prokopowicz, W., Saito, T., Scaffner, H., Tachenov, S., Werner-Malento, E., Wollersheim, H.J., Benzoni, G., Blank, B.B., Brandau, C., Bruce, Alison, Camera, F., Catford, W.N., Cullen, I.J., Dombrádi, Zs., Estevez, E., Gelletly, W., Ilie, G., Jolie, J., Jones, G.A., Jungclaus, A., Kmiecik, M., Kondev, F.G., Kurtukian-Nieto, T., Lalkovski, S., Liu, Z., Maj, A., Myalski, S., Pfützner, M., Schwertel, S., Shizuma, T., Simons, A.J., Walker, P.M., Wieland, O. and Xu, F.R. (2008) Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643 Tc Physics Letters B, 660 (4). pp. 326-330. ISSN 0370-2693


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The low-lying structures of the self-conjugate (N=Z) nuclei 8241Nb41 and 8643Tc43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a 107Ag beam. These represent the heaviest odd–odd N=Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N=Z line between the doubly-magic systems 5628Ni and 10050Sn and support a preference for T=1 states in Tz=0 odd–odd nuclei at low excitation energies associated with a T=1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in 82Nb may be interpreted as an isospin-changing K isomer.

Item Type: Journal article
Additional Information: This is the author’s version of a work that was accepted for publication in Physics Letters B. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physics Letters B, 660, 4, 2008, 10/1016/j.physletb.2008.01.017
Subjects: F000 Physical Sciences > F300 Physics
DOI (a stable link to the resource): 10/1016/j.physletb.2008.01.017
Faculties: Faculty of Science and Engineering > School of Computing, Engineering and Mathematics > Engineering and Product Design Research > Nuclear Physics
Depositing User: editor environment
Date Deposited: 22 Aug 2008
Last Modified: 17 Dec 2015 14:10

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