H. von Garrel

Proton–neutron structure of the N=52 nucleus 92Zr

Abstract 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 2+1 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.

Two-phonon 1- state in Sn-112 observed in resonant photon scattering

Results of a photon scattering experiment on

New findings for mixed‐symmetry states

^{112}\mathrm{Sn}

Two-phonon 1{sup -} state in {sup 112}Sn observed in resonant photon scattering

using bremsstrahlung with an endpoint energy of

Two-phonon1−state inSn112observed in resonant photon scattering

{E}_{0}=3.8

Low-lying dipole excitations in nuclei in the mass regions of the new dynamical symmetries

MeV are reported. A

Low-lying E1, M1, and E2 strength distributions in 124,126,128,129,130,131,132,134,136Xe : systematic photon scattering experiments in the mass region of a nuclear shape or phase transition

J=1

Photon scattering experiments off176Hfand the systematics of low-lying dipole modes in the stable even-even Hf isotopes176,178,180Hf

state at

Dipole strength distributions in the stable Ba isotopes {sup 134-138}Ba: A study in the mass region of a nuclear shape transition

{E}_{x}=3434(1)

One-phonon 2+ 1,ms mixed-symmetry states of 148 Sm observed in nuclear resonance fluorescence

keV has been excited. Its decay width into the ground state amounts to