Observation of a -decaying millisecond isomeric state in Cd

Jungclaus, A.*; Grawe, H.*; Nishimura, Shunji*; Doornenbal, P.*; Lorusso, G.*; Simpson, G. S.*; Sderstrm, P.-A.*; Sumikama, Toshiyuki*; Taprogge, J.*; Xu, Z. Y.*; Baba, Hidetada*; Browne, F.*; Fukuda, N.*; Gernhuser, R.*; Gey, G.*; Inabe, Naoto*; Isobe, T.*; Jung, H. S.*; Kameda, Daisuke*; Kim, G. D.*; Kim, Y.-K.*; Kojouharov, I.*; Kubo, Toshiyuki*; Kurz, N.*; Kwon, Y. K.*; Li, Z.*; Sakurai, Hiroyoshi*; Schaffner, H.*; Shimizu, Y.*; Steiger, K.*; Suzuki, H.*; Takeda, H.*; Vajta, Zs.*; Watanabe, H.*; Wu, J.*; Yagi, A.*; Yoshinaga, Kenta*; Benzoni, G.*; Bnig, S.*; Chae, K. Y.*; Coraggio, L.*; Daugas, J.-M.*; Drouet, F.*; Gadea, A.*; Gargano, A.*; Ilieva, S.*; Itaco, N.*; Kondev, F. G.*; Krll, T.*; Lane, G. J.*; Montaner-Piz, A.*; Moschner, K.*; Mcher, D.*; Naqvi, F.*; Niikura, Megumi*; Nishibata, Hiroki*; Odahara, Atsuko*; Orlandi, R.  ; Patel, Z.*; Podolyk, Zs.*; Wendt, A.*

A new high-spin isomer in the neutron-rich nucleus Cd was populated in the projectile fission of a U beam at the Radioactive Isotope Beam Factory at RIKEN. A half-life of T = 6.3(8) ms was measured for the new state which was tentatively assigned a spin/parity of (15). The isomeric state decays via the emission of a 309-keV ray with multipolarity. The experimental results are compared to shell model calculations performed using state-of-the-art realistic effective interactions and to the neighbouring nucleus Cd. The comparison with calculations shows that adjustments of the pairing and multipole parts of the effective interaction derived from the CD-Bonn nucleon-nucleon potential are required in order to describe the properties of nuclei in the region around Sn.