Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 10: Posters Wednesday (Cooling and Trapping, Electron Scattering and Recombination)
A 10.43: Poster
Mittwoch, 4. April 2001, 12:30–15:00, AT3
Lifetime measurements of metastable states in complex atomic ions using laser probing of ions in a storage ring — •D. Rostohar1, A. Derkatch2, H. Hartman3, S. Johansson3, H. Lundberg4, S. Mannervik1, L.-O. Norlin5, P. Royen2, A. Schmitt6, and X. Tordoir7 — 1Atomic Physics, Stockholm University, S-104 05 Stockholm, Sweden — 2Physics Department, Stockholm University, S-113 85 Stockholm, Sweden — 3Atomic Spectroscopy, Department of Physics, S-221 00 Lund, Sweden — 4Department of Physics, Lund Institute of Technology, S-221 00 Lund, Sweden — 5Royal Institute of Technology, S-104 05 Stockholm, Sweden — 6Fachbereich Physik, Universität Kaiserslautern, D-67663 Kaiserslautern, Germany — 7Physique Nucleaire Experimentale, Universite Liege, B-4000 Liege, Belgium
Collinear ion beam-laser technique yields high resolution. By the use of isotope separation and injection into an ion storage ring, detailed time- resolved studies can be performed on specific isotopes. Laser light can be used to induce a radiative transition from a metastable state. The laser-induced fluorescence signal will be proportional to the population of the metastable state. By sequential variation of the delay between the metastable production and laser probing, lifetimes in the range from 10 ms to a few seconds can be determined. The method has been applied to the complex ions Fe+ and Eu+. Due to its selectivity and sensitivity, the present method is well suited for measurements of lifetimes.