Alpha decay of Rf

Asai, Masato  ; Tsukada, Kazuaki  ; Sato, Nozomi*; Sato, Tetsuya   ; Toyoshima, Atsushi; Ishii, Tetsuro  ; Miyashita, Sunao*; Kaneya, Yusuke*; Shima, Yosuke*; Shibata, Michihiro*

We have obtained new experimental data for nuclear structure of Rf through -decay spectroscopy. We have reconfirmed existence of two transitions in the decay of Rf through - coincidence measurement, and determined the -transition energy very precisely through high-resolution -fine structure measurement. On the basis of these experimental results, we have estimated spin-parities and neutron single-particle configurations of the ground- and isomeric states of Rf, and have obtained information on the single-particle configurations and nuclear deformations for heavier superheavy nuclei.