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APS » Journals » Phys. Rev. Lett. » Volume 94 » Issue 12
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Phys. Rev. Lett. 94, 122501 (2005) [4 pages]

B(E2)↑ Measurements for Radioactive Neutron-Rich Ge Isotopes: Reaching the N=50 Closed Shell

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E. Padilla-Rodal1,2, A. Galindo-Uribarri1, C. Baktash1, J. C. Batchelder3, J. R. Beene1, R. Bijker2, B. A. Brown4,5, O. Castaños2, B. Fuentes6, J. Gomez del Campo1, P. A. Hausladen1, Y. Larochelle7, A. F. Lisetskiy4,5, P. E. Mueller1, D. C. Radford1, D. W. Stracener1, J. P. Urrego7, R. L. Varner1, and C.-H. Yu1
1Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
2Instituto de Ciencias Nucleares, UNAM, 04510 México, D.F., México
3UNIRIB, Oak Ridge Associated Universities, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
4National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
5Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
6Facultad de Ciencias, UNAM, 04510 México, D.F., México
7Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA

Received 10 December 2004; published 29 March 2005

The B(E2;01+→21+) values for the radioactive neutron-rich germanium isotopes 78,80Ge 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.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.122501
DOI:
10.1103/PhysRevLett.94.122501
PACS:
21.10.Ky, 21.60.Cs, 25.70.De, 27.50.+e
 
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