Counting cold collisions

B Ueberholz, S Kuhr, D Frese, D Meschede, V Gomer

Research output: Contribution to journalLetterpeer-review

22 Citations (Scopus)


We have explored experimentally a novel possibility to study exoergic cold atomic collisions. Trapping of small countable atom numbers in a shallow magneto-optical trap and monitoring of their temporal dynamics allows us to directly observe isolated two-body atomic collisions and provides detailed information on loss statistics. A substantial fraction of such cold collisional events has been found to result in the loss of one atom only. We have also observed for the first time a strong optical suppression of ground-state hyperfine-changing Collisions in the trap by its repump laser field.

Original languageEnglish
Pages (from-to)L135-L142
Number of pages8
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number4
Publication statusPublished - 28 Feb 2000


  • cold atomic collisions
  • atom numbers
  • shallow magneto-optical trap
  • counting
  • cold collisions
  • optical suppression


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