title: B(E2) upward arrow measurements for radioactive neutron-rich ge isotopes: reaching the N=50 closed shell.
abstract: The B(E2;0(+)(1)-->2(+)(1)) values for the radioactive neutron-rich germanium isotopes (78,80)Ge and the closed neutron shell nucleus 82Ge were measured at the HRIBF using Coulomb excitation in inverse kinematics. These data allow a study of the systematic trend between the subshell closures at N=40 and 50. The B(E2) behavior approaching N=50 is similar to the trend observed for heavier isotopic chains. A comparison of the experimental results with a shell model calculation demonstrates persistence of the N=50 shell gap and a strong sensitivity of the B(E2) values to the effective interaction.
authors.affiliation: Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: E
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authors.lastname: Padilla-Rodal
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authors.lastname: Galindo-Uribarri
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authors.lastname: Batchelder
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authors.forename: J Gomez
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authors.lastname: del Campo
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authors.initials: PA
authors.lastname: Hausladen
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authors.lastname: Varner
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authors.lastname: Yu