In-beam spectroscopy of 254No.

Evidence for the presence of non-yrast states in 254No has been observed in two different in-beam experiments carried out at the University of Jyväskylä. Firstly an in-beam conversion electron spectroscopic study was performed with the SACRED spectrometer, revealing a distribution consisting of high-multiplicity electron cascades. This provides an indirect proof of the presence of high K-bands in 254No. In a more recent in-beam γ-ray spectroscopic measurement, evidence for the decay of non-yrast states in 254No has been observed for the first time. It is speculated that the observation of high-energy γ rays is due to the decay of a K = 3 band-head state. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]