Phys. Rev. Lett. 84, 1874 - 1877 (2000)Photoassociation Spectroscopy of Cold He(2 3S) Atoms |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
N. Herschbach, P. J. J. Tol, W. Vassen, and W. Hogervorst
Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
G. Woestenenk, J. W. Thomsen, P. van der Straten, and A. Niehaus
Debye Institute, Department of Atomic and Interface Physics, Utrecht University, P.O. Box 80.000, 3508 TA Utrecht, The Netherlands
Received 27 September 1999
We observe vibrational states by photoassociation spectroscopy of cold He(2 3S) atoms. Photoassociation resonances are detected as peaks in the Penning ionization rate over a frequency range of 20 GHz below the atomic 2 3S1-2 3P2 transition frequency. We have observed three vibrational series, of which two can be identified. A possible mechanism to explain the observed increase of the Penning ionization rate is discussed.
©2000 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v84/p1874
DOI: 10.1103/PhysRevLett.84.1874
PACS: 33.80.Eh, 32.80.Pj, 33.20.Tp
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