Lifetime of the 2 {sup 3}P{sub 0} state of He-like {sup 197}Au

• Published in: Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-02, Vol.69 (2)
• Main Authors: Toleikis, S., Berdermann, E., Beyer, H.F., Bosch, F., Czanta, M., Gumberidze, A., Kozhuharov, C., Liesen, D., Ma, X., Mokler, P.H., Stoehlker, T., Manil, B., Dunford, R.W., Indelicato, P., Marrus, R., Schneider, D., Simionovici, A., Stachura, Z., Warczak, A., Zou, Y.
• Format: Article
• Language: English
• Subjects: ATOMIC AND MOLECULAR PHYSICS; CATIONS; CHEMICAL VAPOR DEPOSITION; DIAMONDS; ELECTRONS; EMISSION SPECTRA; FOILS; GOLD; GOLD 197; GROUND STATES; HYPERFINE STRUCTURE; LIFETIME; QUENCHING; RADIATIVE DECAY; TIME-OF-FLIGHT METHOD; X-RAY SPECTRA
• ISSN: 1050-2947; 1094-1622
• DOI: 10.1103/PhysRevA.69.022507

An experiment has been performed at the Gesellschaft fuer 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 {sup 3}P{sub 0} state, {tau}(2 {sup 3}P{sub 0}), of the two-electron ion {sup 197}Au{sup 77+} (He-like gold) with the result {tau}(2 {sup 3}P{sub 0})=22.16(0.81) ps. The mechanism for the decay of this state is by a hyperfine-induced radiative transition to the 1 {sup 1}S{sub 0} 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.