Spectroscopy of Na2 by photoassociation of laser-cooled Na

P. D. Lett, K. Helmerson, W. D. Phillips, L. P. Ratliff, S. L. Rolston, M. E. Wagshul

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We have observed the spectrum of long range molecular states of singly excited Na2 formed by photoassociation during ultracold associative ionization collisions of laser-cooled Na atoms. The low kinetic energy of the collision allows us to obtain very high resolution spectra and to observe states close to the dissociation limit. The spectrum shows regular vibrational series characteristic of the 1/R3 long range portion of the 1g potential (asymptotically S1/2+P3/2) as well as molecular hyperfine structure within these peaks. We extract potential parameters and compare with recent theory.

Original languageEnglish (US)
Pages (from-to)2200-2203
Number of pages4
JournalPhysical Review Letters
Issue number14
Publication statusPublished - Jan 1 1993
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Lett, P. D., Helmerson, K., Phillips, W. D., Ratliff, L. P., Rolston, S. L., & Wagshul, M. E. (1993). Spectroscopy of Na2 by photoassociation of laser-cooled Na. Physical Review Letters, 71(14), 2200-2203. https://doi.org/10.1103/PhysRevLett.71.2200