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B(E2) upward arrow measurements for radioactive neutron-rich ge isotopes: reaching the N=50 closed shell |
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| Authors: | Padilla-Rodal E Galindo-Uribarri A Baktash C Batchelder J C Beene J R Bijker R Brown B A Castaños O Fuentes B del Campo J Gomez Hausladen P A Larochelle Y Lisetskiy A F Mueller P E Radford D C Stracener D W Urrego J P Varner R L Yu C-H |
| Institution: | Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. |
| 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. |
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