Weakly deformed oblate structures in Os-198(76)122

Podolyak, Zs.; Steer, S. J.; Pietri, S.; Xu, F. R.; Liu, H. L.; Regan, P. H.; Rudolph, D.; Garnsworthy, A. B.; Hoischen, R.; Gorska, M.; Gerl, J.; Wollersheim, H. J.; Kurtukian-Nieto, T.; Benzoni, G.; Shizuma, T.; Becker, F.; Bednarczyk, P.; Caceres, L.; Doornenbal, P.; Geissel, H.; Grebosz, J.; Kelic, A.; Kojouharov, I.; Kurz, N.; Montes, F.; Prokopowicz, W.; Saito, T.; Schaffner, H.; Tashenov, S.; Heinz, A.; Pfutzner, M.; Jungclaus, A.; Balabanski, D. L.; Brandau, C.; Bruce, A. M.

doi:10.1103/PhysRevC.79.031305

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Weakly deformed oblate structures in Os-198(76)122

作者：Podolyak, Zs.; Steer, S. J.; Pietri, S.; Xu, F. R.; Liu, H. L.; Regan, P. H.; Rudolph, D.; Garnsworthy, A. B.; Hoischen, R.; Gorska, M.; Gerl, J.; Wollersheim, H. J.; Kurtukian-Nieto, T.; Benzoni, G.; Shizuma, T.; Becker, F.; Bednarczyk, P.; Caceres, L.; Doornenbal, P.; Geissel, H.; Grebosz, J.; Kelic, A.; Kojouharov, I.; Kurz, N.; Montes, F.; Prokopowicz, W.; Saito, T.; Schaffner, H.; Tashenov, S.; Heinz, A.; Pfutzner, M.; Jungclaus, A.; Balabanski, D. L.; Brandau, C.; Bruce, A. M.

来源：Physical Review C, 2009, 79(3): 031305.

DOI：10.1103/PhysRevC.79.031305

摘要

Gamma rays de-exciting isomeric states in the neutron-rich nucleus Os-198(76)122 have been observed following relativistic projectile fragmentation of a 1 GeV per nucleon Pb-208 beam. The ground-state band has properties compatible with oblate deformation. The evolution of the structure of Os isotopes characterized by sudden prolate-oblate shape change is discussed and contrasted with the smooth change known in the Pt chain.