FIRST OBSERVATION OF MIXED-SYMMETRY STATES IN A GOOD U(5) NUCLEUS

The properties of 2(+) states at 2156 keV and 2231 keV in Cd-112 have been measured using the (n,n'gamma) reaction. These states have strong decay branches, determined to be almost pure M1, to the 2(1)(+) level with B(M1) values of 0.044(5)mu(N)(2) and 0.055(5)mu(N)(2) respective ly, and are interpreted as the main fragments of the 2(+) mixed-symmet ry state, the vibrational analogue of the ''scissors-mode'' state in d eformed nuclei. These observations provide the first firm evidence of mixed-symmetry states in a good U(5) nucleus.