G. Vorobjev

Mass Measurements and Implications for the Energy of the High-Spin Isomer in 94Ag

A. Kankainen [1], V. -V. Elomaa [1], L. Batist [2], S. Eliseev [2,3], T. Eronen [1], U. Hager [1], J. Hakala [1], A. Jokinen [1,2,3], I. D. Moore, Yu. N. Novikov, H. Penttilä, A. Popov [2], S. Rahaman [1], S. Rinta-Antila [1], J. Rissanen [1], A. Saastamoinen [1,2], D. M. Seliverstov, T. Sonoda [1], G. Vorobjev [2,3], C. Weber [1], J. Äystö

Abstract

Nuclides in the vicinity of 94Ag have been studied with the Penning trap mass spectrometer JYFLTRAP at the Ion-Guide Separator On-Line. The masses of the two-proton-decay daughter 92Rh and the beta-decay daughter 94Pd of the high-spin isomer in 94Ag have been measured, and the masses of 93Pd and 94Ag have been deduced. When combined with the data from the one-proton or two-proton-decay experiments, the results lead to contradictory mass excess values for the high-spin isomer in 94Ag, -46370(170) or -44970(100) keV, corresponding to excitation energies of 6960(400) or 8360(370) keV, respectively.

HITRAP: A facility at GSI for highly charged ions

H. -J. Kluge, T. Beier, K. Blaum, L. Dahl, S. Eliseev, F. Herfurth, B. Hofmann, O. Kester, S. Koszudowski, C. Kozhuharov, G. Maero, W. Noertershaeuser, J. Pfister, W. Quint, U. Ratzinger, A. Schempp, R. Schuch [1,2], T. Stoehlker, R. C. Thompson, M. Vogel [1], G. Vorobjev [1], D. F. A. Winters, G. Werth [1]

Abstract

An overview and status report of the new trapping facility for highly charged ions at the Gesellschaft fuer Schwerionenforschung is presented. The construction of this facility started in 2005 and is expected to be completed in 2008. Once operational, highly charged ions will be loaded from the experimental storage ring ESR into the HITRAP facility, where they are decelerated and cooled. The kinetic energy of the initially fast ions is reduced by more than fourteen orders of magnitude and their thermal energy is cooled to cryogenic temperatures. The cold ions are then delivered to a broad range of atomic physics experiments.