Low-level structure of {sup 70}Ge from lifetime and g-factor measurements following {alpha} transfer to a {sup 66}Zn ion beam

• Published in: Physical review. C, Nuclear physics Nuclear physics, 2006-08, Vol.74 (2)
• Main Authors: Leske, J., Speidel, K.-H., Schielke, S., Gerber, J., Maier-Komor, P., Robinson, S. J. Q., Escuderos, A., Sharon, Y. Y., Zamick, L., Institut de Recherches Subatomiques, F-67037 Strasbourg, Physik-Department, Technische Universitaet Muenchen, James-Franck-Str., D-85748 Garching, Geology and Physics Department, University of Southern Indiana, Evansville, Indiana 47712, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855
• Format: Article
• Language: English
• Subjects: ALPHA-TRANSFER REACTIONS; CALCIUM 40; COULOMB EXCITATION; DSA METHOD; E2-TRANSITIONS; GERMANIUM 68; GERMANIUM 70; ION BEAMS; LANDE FACTOR; LIFETIME; MAGNETIC FIELDS; NUCLEAR PHYSICS AND RADIATION PHYSICS; SHELL MODELS; TRANSIENTS; ZINC 66; ZINC 68
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PHYSREVC.74.024315

The g factor of the 2{sub 1}{sup +} state in {sup 70}Ge was remeasured using a different experimental approach. Furthermore, for the first time an experimental value (although with a large uncertainty) was obtained for the g factor of the 2{sub 2}{sup +} state in {sup 70}Ge. All this was accomplished by employing the technique of {alpha} transfer to an energetic {sup 66}Zn ion beam in inverse kinematics combined with transient magnetic fields in ferromagnetic gadolinium. The value of the g(2{sub 1}{sup +}) factor obtained ranges from +0.32(11) to +0.43(12), subject to certain assumptions. This range of values is in general agreement with the range of values in the literature, where Coulomb excitation and different IMPAC techniques were used. Lifetimes of several low-lying states were redetermined using the Doppler-Shift-Attenuation-Method. The deduced B(E2) values and the g(2{sub 1}{sup +}) factor are discussed within the framework of large-scale full fp shell model calculations with a closed {sup 40}Ca core and including excitations from the f{sub 7/2} orbital. The results are compared with recent data for {sup 68}Ge and {sup 68}Zn.