Excitation of particle-vibration multiplets in the A = 110 region by two-neutron stripping reactions

The /sup 103/Rh, /sup 106//sub,//sup 108/Pd, and /sup 107//sub,//sup 109/Ag(t,p) reactions have been studied at a bombarding energy of 17 MeV. Excitation energies and enhancement factors were obtained for a number of levels up to about 2.5 MeV excitation in the residual nuclei. The L = 0 transitions observed indicate that these nuclei are of a transitional character, though more closely resembling pariring rotational than pairing vibrational nuclei. The low-lying negative parity levels in the Ag nuclei appear to be well described as a (2p/sub 1///sub 2/) proton weakly coupled to the appropriate core state in the even Pd cores. /sup 105/Rh appears to display similar weak coupling characteristics. However, the higher-lying levels such as the 3/sup -/ based states are severely mixed with single particle levels and perhaps with other elementary modes of excitation as well. (AIP)