Multi-quasiparticle isomers inLu174

Yrast three - quasiparticle K isomers in neutron - rich 181 Hf

Long-lived isomeric states in nuclei are unique laboratories for studying the detailed properties of nuclear wave functions. From an experimental standpoint, transitions deexciting long-lived isomers provide clean information on wave-function admixtures, since a better signal-to-noise ratio is achieved if short-lived excitations are allowed to decay away. From a theoretical perspective, a long-...

Multi-quasiparticle States in 256Rf

Multi - quasiparticle states in 184 W via multi - nucleon transfer

A multi-nucleon transfer reaction using an 850 MeV Xe beam incident on a Pt target was used to populate high-spin states in W, 14 nucleons from the target. A 4-quasiparticle isomer with t1/2 = 188±38 ns has been observed for the first time and its de-excitation through collective and intrinsic structures studied. The results are compared with predictions of blocked BCS Nilsson calculations. Obs...

3 - 6 - 2009 Multi - quasiparticle States in 256 Rf

Quasiparticle-tuned superconducting mixer

We have successfully employed the recently observed quasiparticle admittance of a superconducting tunnel junction as the tuning element for a superconductorinsulator-superconductor mixer. This is the first demonstration of an electronic on-chip tuning element for a superconducting detector. We observe an increase in the dynamic resistance and an improvement in mixer gain and noise temperature a...