Phys. Rev. A 69, 022507 (2004) [5 pages]Lifetime of the 2 3P0 state of He-like 197Au |
S. Toleikis1 *, B. Manil2, E. Berdermann1, H. F. Beyer1, F. Bosch1, M. Czanta1, R. W. Dunford3, A. Gumberidze1, P. Indelicato4, C. Kozhuharov1, D. Liesen1, X. Ma1, R. Marrus5, P. H. Mokler1, D. Schneider6, A. Simionovici7, Z. Stachura8, T. Stöhlker1, A. Warczak9, and Y. Zou10
1Gesellschaft für Schwerionenforschung (GSI), Planckstrasse 1, D-64291 Darmstadt, Germany
2CIRIL-GANIL, rue Claude Bloch, F-14070 Caen Cedex 5, France
3Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
4École Normale Supérieure et Université Pierre et Marie Curie, 4 place Jussieu, F-75252 Paris Cedex 5, France
5Department of Physics, University of California, Berkeley, California 94720-7300, USA
6Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550-9234, USA
7European Synchrotron Radiation Facility (ERSF), Boîte Postale 220, F-38043 Grenoble Cedex, France
8Institute of Nuclear Physics, ulnicka Radzikowskiego 152, 31-342 Kraków, Poland
9Institute of Physics, ulnicka Reymonta 4, 30-059 Kraków, Poland
10Max-Planck-Institute für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
Received 4 November 2003; published 20 February 2004
An experiment has been performed at the Gesellschaft für Schwerionenforschung accelerator facility using a beam-foil time-of-flight technique with a newly developed chemical vapor deposition diamond particle detector to measure the lifetime of the 2 3P0 state, τ(2 3P0), of the two-electron ion 197Au77+ (He-like gold) with the result τ(2 3P0)=22.16(0.81) ps. The mechanism for the decay of this state is by a hyperfine-induced radiative transition to the 1 1S0 ground state (hyperfine quenching). The lifetime is therefore determined by a number of fundamental atomic and nuclear parameters not normally involved in radiative decay of allowed transitions. The experimental result is compared to several theoretical calculations.
©2004 The American Physical Society
URL: http://link.aps.org/abstract/PRA/v69/e022507
DOI: 10.1103/PhysRevA.69.022507
PACS: 32.10.Fn, 21.10.Ky, 32.30.Rj, 32.70.Cs
* Electronic address: s.toleikis@gsi.de
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