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Intensity Effects in Ultracold Photoassociation Line Shapes



A Simoni, Paul S. Julienne, Eite Tiesinga, Carl J. Williams


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 0g- symmetry state. We consider intensities up to few hundreds W/cm2, a strongly saturating intensity for typical transitions of experimental interest. For these intensities the 0g- 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.
Physical Review A (Atomic, Molecular and Optical Physics)
No. 6


photoassociation spectroscopy, rubidium dimer, sodium dimer, strong light fields, ultra-cold collisions


Simoni, A. , Julienne, P. , Tiesinga, E. and Williams, C. (2002), Intensity Effects in Ultracold Photoassociation Line Shapes, Physical Review A (Atomic, Molecular and Optical Physics) (Accessed November 28, 2023)
Created November 30, 2002, Updated October 12, 2021