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Photo induced collisions with laser cooled He* atoms |
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| Authors: | HC Mastwijk M van Rijnbach JW Thomsen P van der Straten A Niehaus |
| Institution: | (1) The Debye Institute, University of Utrecht, P.O. Box 80.000, 3508 TA Utrecht, The Netherlands, NL |
| 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 |
| 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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