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Neutron-proton pairing competition in N = Z nuclei: Metastable state decays in the proton dripline nuclei Nb-82(41) and Tc-86(43)

Garnsworthy, AB, Regan, PH, Caceres, L, Pietri, S, Sun, Y, Rudolph, D, Gorska, M, Podolyak, Z, Steer, SJ, Hoischen, R, Heinz, A, Becker, F, Bednarczyk, P, Doornenbal, P, Geissel, H, Gerl, J, Grawe, H, Grebosz, J, Kelic, A, Kojouharov, I, Kurz, N, Montes, F, Prokopowicz, W, Saito, T, Schaffner, H, Tachenov, S, Werner-Malento, E, Wollersheim, HJ, Benzoni, G, Blank, BB, Brandau, C, Bruce, AM, Camera, F, Catford, WN, Cullen, IJ, Dombradi, Z, Estevez, E, Gelletly, W, Ilie, G, Jolie, J, Jones, GA, Jungclaus, A, Kmiecik, M, Kondev, FG, Kurtukian-Nieto, T, Lalkovski, S, Liu, Z, Maj, A, Myalski, S, Pfutzner, M, Schwertel, S, Shizuma, T, Simons, AJ, Walker, PM, Wielandi, O and Xu, FR (2008) Neutron-proton pairing competition in N = Z nuclei: Metastable state decays in the proton dripline nuclei Nb-82(41) and Tc-86(43) PHYSICS LETTERS B, 660 (4). 326 - 330. ISSN 0370-2693

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Abstract

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 previous termneutron–proton pairingnext term gap. Comparison with Projected Shell Model calculations suggests that the decay in 82Nb may be interpreted as an isospin-changing K isomer.

Item Type: Article
Additional Information: NOTICE: 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),Feb 2008, DOI 10.1016/j.physletb.2008.01.017.
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, ODD-ODD, EXCITED-STATES, SHELL-MODEL, IDENTIFICATION, FRAGMENTATION, SYSTEMATICS, ISOTOPES, REGION, ZR-82, BANDS
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Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Mr Adam Field
Date Deposited: 03 Dec 2011 12:27
Last Modified: 23 Sep 2013 18:51
URI: http://epubs.surrey.ac.uk/id/eprint/7813

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