Following the successful identification of mixed-symmetric one- and two-phonon states in the N = 52 nuclei 94Mo and 96Ru, we have performed a photon scattering experiment on the N = 52 isotone 92Zr. Experimental data and shell model calculations show that both, single particle and collective degrees of freedom are present in the low-lying levels of 92Zr. The second excited quadrupole state shows the signatures of the one-phonon mixed-symmetric 2+ state, while calculations and data indicate an almost pure neutron configuration for the 21+, state, in contradiction with the F-spin symmetric limit. Furthermore, two strong dipole excitations, which are candidates for the two-phonon quadrupole-octupole coupled E1 excitation and for the mixed-symmetric 1+ two-phonon state, were observed.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Dec 19 2002|
Bibliographical noteFunding Information:
For discussions the authors thank R.F. Casten, F. Iachello, T. Otsuka and R. Schwengner and we thank H. Klein for the Rits-Tk interface. This work was supported by the Deutsche Forschungsgemeinschaft under contracts Br 799/11-1, Kn 154/30 and Pi 393/1-2.
- (γ, γ′)
- A = 92
- Mixed symmetry
- Shell model
ASJC Scopus subject areas
- Nuclear and High Energy Physics