<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>E</mml:mi><mml:mn>2</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:mo>↑</mml:mo></mml:math>Measurements for Radioactive Neutron-Rich Ge Isotopes: Reaching the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>50</mml:mn></mml:math>Closed Shell
E. Padilla-RodalPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAA. Galindo-UribarriPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAC. BaktashPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAJ. C. BatchelderUNIRIB, Oak Ridge Associated Universities, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAJ. R. BeenePhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAR. BijkerInstituto de Ciencias Nucleares, UNAM, 04510 México, D.F., MéxicoB. A. BrownDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAOctavio CastañosInstituto de Ciencias Nucleares, UNAM, 04510 México, D.F., MéxicoB. FuentesFacultad de Ciencias, UNAM, 04510 México, D.F., MéxicoJ. Gómez del CampoPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAPaul HausladenPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAY. LarochelleDepartment of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USAA. F. LisetskiyDepartment of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USAP. E. MuellerPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAD. C. RadfordPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAD. W. StracenerPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAJ. P. UrregoDepartment of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USAR. L. VarnerPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAC.-H. YuPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
2005lv
ABI
Аннотация
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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