Freiburg 1999 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 10: Kernphysik II / Spektroskopie I
HK 10.4: Talk
Monday, March 22, 1999, 17:30–17:45, B
The Structure of the 4.743 MeV State in 88Sr * — •L. Käubler1, P. v. Brentano2, J. Eberth2, J. Enders3, A. Fitzler2, C. Fransen2, M. Grinberg4, E. Grosse1, R.-D. Herzberg2, H. Kaiser3, P. v. Neumann-Cosel3, N. Pietralla2, H. Prade1, A. Richter3, H. Schnare1, R. Schwengner1, Ch. Stoyanov4, H.-G. Thomas2, H. Tiesler2, D. Weißhaar2, I. Wiedenhöver2, and A. Zilges3 — 1Institut für Kern- und Hadronenphysik, FZ Rossendorf, D-01314 Dresden — 2Institut für Kernphysik, Universität zu Köln, D-50937 Köln — 3Institut für Kernphysik, TU Darmstadt, D-64289 Darmstadt — 4Institute of Nuclear Research and Nuclear Energy, Sofia, BG-1784 Sofia
A nuclear resonance fluorescence experiment on the N=50 nucleus
88Sr has been performed at the
S-DALINAC accelerator with an electron energy of 6.8 MeV and
the linear
polarization of the scattered photons has been measured. A
EUROBALL CLUSTER detector has been used as Compton
polarimeter for γ-rays with 1.8 MeV < Eγ <
6.5 MeV.
For the 4.743 MeV state which has been considered until now [1] as the
1− two-phonon state with a 2+ ⊗ 3− structure
positive parity has been found. The structure of this 1+ state
and that of other newly observed states is discussed in the
framework of QPM calculations.
[1] F. R. Metzger, Phys. Rev. C11 (1975) 2085
*Supported by BMBF, contracts 06DA665I and 06OK862I,
DFG, contracts Gr-1674/1-1, Br-799/6-2 and Ri-242/12-1, and
Sächsisches SMWK, contract 7533-70-FZR/702