Gamma-rays and conversion electrons from ^205Rn

High-spin states in ^205Rn were populated using the ^170Er(^40Ar,5n) reaction at a beam energy of 183 MeV, the ^40Ar beam being provided by the ATLAS accelerator at Argonne National Laboratory. Subsequent gamma-ray and conversion electron decays were measured using the Gammasphere and ICE Ball II arrays. ICE Ball is an array of six mini-orange electron spectrometers and has a total peak efficiency of about 6%. The electron energy resolution obtained with calibration sources was approximately 3.0 keV while an energy resolution of about 10 keV was obtained in beam, the increase being mostly due to the target thickness and Doppler effects. The measured conversion coefficients confirm the previous spin and multipolarity assignments for levels in ^205Rn [1]. In particular, the M1 character of transitions in a proposed shears band is confirmed. In addition, the high quality γ^3 and γ^3 - e^-1 coincidence data allowed the identification and placement of several new transitions. The analysis is ongoing and the latest results will be presented. 1. J. Novak et al. Phys. Rev. C59 R2989 (1999). This work is partly supported by the U.S. DOE under grant numbers DE-FG02-91ER-40609, DE-FG02-88ER-40417 and DE-FG02-96ER-40983 and by the DFG under grant number Pi 393/1-1.