Acta Physica Polonica B

Vol. 32, No. 3, March 2001, page 971

Fine Studies of Proton Radioactivity with Digital Signal Processing

K.P. Rykaczewski, J.C. Batchelder, C.R. Bingham, T.N. Ginter, C.J. Gross, R.K. Grzywacz, J.H. Hamilton, D.J. Hartley, Z. Janas, M. Karny, W.D. Kulp, M. Lipoglavsek, J.W. McConnell, M. Momayezi, A. Piechaczek, M.N. Tantawy, J. Wahl, W.B. Walters, J.A. Winger, E.F. Zganjar

Recent proton radioactivity studies at the Holifield Radioactive Ion Beam Facility at Oak Ridge are presented. The experiments were performed by means of a Recoil Mass Separator (RMS) and digital processing of its detector signals. Observation of fine structure in proton emission from the activities : 145Tm (T1/2\approx 3 \mu s) and 146m,gsTm (T1/2\approx 200 ms and 100 ms, respectively) is reported. The structure of the proton emitting states is analyzed in terms of a spherical approach. The properties of daughter states, a 2+ state in 144Er and the s1/2 and h11/2 neutron levels in 145Er, are deduced.

PACS numbers: 23.50.+z, 21.10.--k, 25.60.Pj

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