Acta Physica Polonica B

Vol. 38, No. 4, April 2007, page 1265

Isomeric States in the Light Tc Isotopes

A.B. Garnsworthy, P.H. Regan, S. Pietri, D. Rudolph, L. Caceres, M. Gorska, Zs. Podolyak, S.J. Steer, A. Heinz, F. Becker, P. Bednarczyk, P. Doornenbal, H. Geissel, J. Gerl, H. Grawe, J. Grebosz, A. Kelic, I. Kojouharov, N. Kurz, F. Montes, W. Prokopwicz, T. Saito, H. Schaffner, S. Tachenov, E. Werner-Malento, H.J. Wollersheim, G. Benzoni, B. Blank, C. Brandau, A.M. Bruc, F. Camera, W.N. Catford, I.J. Cullen, Zs. Dombradi, E. Estevez, W. Gelletly, R. Hoischen, G. Ilie, J. Jolie, G.A. Jones, A. Jungclaus, M. Kmiecik, F.G. Kondev, T. Kurtukian-Nieto, S. Lalkovski, Z. Liu, A. Maj, S. Myalski, M. Pfuetzner, T. Shizuma, A.J. Simons, S. Schwertel, P.M. Walker, O. Wieland

Preliminary results from the first experiment of the Stopped Beam RISING campaign are presented. The relativistic projectile fragmentation of a 750 MeV/u beam of 107Ag populated isomeric states in very neutron deficient nuclei at the proton dripline around mass 80--90. Nuclei were unambiguously identified using the FRagment Separator (FRS) and its ancillary detectors located at GSI. The ions produced were slowed down from relativistic energies by means of an Al degrader and implanted in the centre of the high-efficiency Stopped RISING array. This allowed the identification of new excited states in the N=Z=43 nucleus, 86Tc, populated following the de-excitation of a microsecond isomer. Preliminary results of this analysis, as well as previously unobserved isomeric states in 87,88Tc, are reported.

PACS numbers: 29.30.Kv, 23.20.Lv


 
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