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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, A B; Regan, P H; Caceres, L; Pietri, S; Sun, Y; Rudolph, Dirk LU ; Gorska, M; Podolyak, Zs; Steer, S J and Hoischen, Robert LU , et al. (2008) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 660(4). p.326-330
Abstract
The low-lying structures of the self-conjugate (N = Z) nuclei Nb-82(41)41 and Tc-86(43)43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a Ag-107 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 Ni-56(28) and Sn-100(50) and support a preference for T = 1 states in T-z = 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 Nb-82 may be interpreted as an isospin-changing K isomer.
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publication status
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Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
660
issue
4
pages
326 - 330
publisher
Elsevier
external identifiers
  • wos:000253883700009
  • scopus:39149109921
ISSN
0370-2693
DOI
10.1016/j.physletb.2008.01.017
language
English
LU publication?
yes
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ac58503a-68d8-4364-ae58-2d4fb23a7d2f (old id 1185261)
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2009-06-29 10:05:33
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2017-01-01 05:29:13
@article{ac58503a-68d8-4364-ae58-2d4fb23a7d2f,
  abstract     = {The low-lying structures of the self-conjugate (N = Z) nuclei Nb-82(41)41 and Tc-86(43)43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a Ag-107 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 Ni-56(28) and Sn-100(50) and support a preference for T = 1 states in T-z = 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 Nb-82 may be interpreted as an isospin-changing K isomer.},
  author       = {Garnsworthy, A B and Regan, P H and Caceres, L and Pietri, S and Sun, Y and Rudolph, Dirk and Gorska, M and Podolyak, Zs and Steer, S J and Hoischen, Robert and Heinz, A and Becker, F and Bednarczyk, P and Doornenbal, P and Geissel, H and Gerl, J and Grawe, H and Grebosz, J and Kelic, A and Kojouharov, I and Kurz, N and Montes, F and Prokopowicz, W and Saito, T and Schaffner, H and Tashenov, S and Werner-Malento, E and Wollersheim, H J and Benzoni, G and Blank, B B and Brandau, C and Bruce, A M and Camera, F and Catford, W N and Cullen, I J and Dombradi, Zs and Estevez, E and Gelletly, W and Ilie, G and Jolie, J and Jones, G A and Jungclaus, A and Kmiecik, M and Kondev, F G and Kurtukian-Nieto, T and Lalkovski, S and Liu, Z and Maj, A and Myalski, S and Pfutzner, M and Schwertel, S and Shizuma, T and Simons, A J and Walker, P M and Wieland, O and Xu, F R},
  issn         = {0370-2693},
  language     = {eng},
  number       = {4},
  pages        = {326--330},
  publisher    = {Elsevier},
  series       = {Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics},
  title        = {Neutron-proton pairing competition in N = Z nuclei: Metastable state decays in the proton dripline nuclei Nb-82(41) and Tc-86(43)},
  url          = {http://dx.doi.org/10.1016/j.physletb.2008.01.017},
  volume       = {660},
  year         = {2008},
}