Spectroscopy of transfermium nuclei: 102252No

An in-beam study of excited states in the transfermium nucleus 252No has been performed using the recoil separator RITU together with the JUROSPHERE II array at the University of Jyväskylä. This is the second transfermium nucleus studied in an in-beam experiment. Levels up to spin 20 were populated and compared to levels in 254No. An upbend is seen at a frequency of 200 keV/ℏ corresponding to spin 16. We also use an improved systematics to connect the energy of the lowest 2+ state with its half-life and find that the deformation of both 252,254No is slightly larger than previously assumed.