Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 10: Kernphysik/Spektroskopie
HK 10.7: Vortrag
Freitag, 4. März 2005, 18:30–18:45, TU MA005
The decay of 1+ states as a new probe of the structure of 0+ shape isomers ⋆ — •R. Schwengner1, G. Rusev1,2, F. Dönau1, S. Frauendorf1,3, L. Käubler1, L.K. Kostov2, S. Mallion1, K.D. Schilling1, A. Wagner1, H. von Garrel4, U. Kneissl4, C. Kohstall4, M. Kreutz4, H.H. Pitz4, M. Scheck4, F. Stedile4, P. von Brentano5, J. Jolie5, A. Linnemann5, N. Pietralla6, and V. Werner7 — 1FZ Rossendorf, 01314 Dresden — 2INRNE, 1784 Sofia, Bulgaria — 3Univ. of Notre Dame, IN 46556, USA — 4IfS, Univ. Stuttgart, 70569 Stuttgart — 5IKP, Univ. Köln, 50937 Köln — 6SUNY, NY 11794-3800, USA — 7Yale University, CT 06520-8124, USA
The nuclides 98Mo and 100Mo have been studied in
photon-scattering
experiments by using bremsstrahlung produced from electron beams with
kinetic
energies from 3.2 to 3.8 MeV. Six electromagnetic dipole transitions in
98Mo and 19 in 100Mo were observed for the first time in the
energy
range from 2 to 4 MeV. A specific feature in both nuclides is the
deexcitation
of one state with spin J=1 to the 0+ ground state as well as to the
first excited 0+ state, which cannot be explained in standard models. We
present a model based on one-particle-one-hole excitations which allows us
to
deduce the mixing coefficients for the two 0+ shape-isomeric states from
the
experimental ratio of the transition strengths from the J=1 state to the
0+ ground state and to the 0+ excited state.
⋆ Supported by the DFG with contract Do 466/1-2.