Photo induced collisions with laser cooled He* atoms |
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| Authors: | H.C. Mastwijk M. van Rijnbach J.W. Thomsen P. van der Straten A. Niehaus |
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| Affiliation: | (1) The Debye Institute, University of Utrecht, P.O. Box 80.000, 3508 TA Utrecht, The Netherlands, NL |
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| Abstract: | This paper presents an experimental investigation of cold collisions between metastable helium atoms in an optical trap at 1 mK. Penning (PI) and associative (AI) ionization reactions are distinguished using a mass spectrometer and studied under influence of near resonant laser light. Dramatic enhancement, by more than a factor 15, of the ion rate is observed when the laser is tuned close to resonance. Experimental findings are well-described, on an absolute scale, by model predictions. Received: 9 February 1998 / Revised: 4 May 1998 / Accepted: 14 May 1998 |
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| Keywords: | PACS. 32.80.Pj Optical cooling of atoms trapping [:AND:] 33.80.Eh Autoionization, photoionization, and photodetachment - 34.50.Rk Laser-modified scattering and reactions |
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