Intensity effects in ultracold photoassociation line shapes
- Atomic Physics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8423 (United States)
We derive ultracold atom-atom photoassociation line shapes valid for intense light fields and investigate laser power effects in sodium and rubidium photoassociation to the purely long-range 0{sub g}{sup -} symmetry state. We consider intensities up to a few hundreds W/cm{sup 2}, a strongly saturating intensity for typical transitions of experimental interest. For these intensities the 0{sub g}{sup -} rotational spectrum is still well resolved; however, it is essential to couple the photoassociation resonance to both s- and d-wave ground-state channels. A low-energy d-wave shape resonance can have a profound effect on the line shape. Understanding the line shape is essential for precision spectroscopic analysis and could improve the extraction of ground-state scattering properties such as scattering lengths.
- OSTI ID:
- 20632456
- Journal Information:
- Physical Review. A, Vol. 66, Issue 6; Other Information: DOI: 10.1103/PhysRevA.66.063406; (c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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