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Evidence for reduced collectivity around the neutron mid-shell in the stable even-mass Sn isotopes from new lifetime measurements

AuthorsJungclaus, Andrea ; Walker, J.; Leske, J.; Speidel, K.-H.; Stuchbery, A.E.; East, M.; Boutachkov, P.; Cederkäll, J.; Doornenbal, P.; Egido, J.L.; Ekström, A.; Gerl, J.; Gernhäuser, R.; Goel, N.; Górska, M.; Kojouharov, I.; Maier-Komor, P.; Modamio, V. ; Naqvi, F.; Pietralla, N.; Pietri, S.; Prokopowicz, W.; Schaffner, H.; Schwengner, R.; Wollersheim, H.-J.
Issue Date2011
CitationPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 695: 110- 114 (2011)
AbstractPrecise measurements of the lifetimes of the first excited 2+ states in the stable even-A Sn isotopes 112-124Sn have been performed using the Doppler shift attenuation technique. For the isotopes 112Sn, 114Sn and 116Sn the E2 transition strengths deduced from the measured lifetimes are in disagreement with the previously reported values and indicate a shallow minimum at N=66. The observed deviation from a maximum at mid-shell is attributed to the obstructive effect of the s1/2 neutron orbital in generating collectivity when near the Fermi level. © 2010 Elsevier B.V.
Identifiersdoi: 10.1016/j.physletb.2010.11.012
issn: 0370-2693
Appears in Collections:(CFMAC-IEM) Artículos
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