Subthermal linewidths in photoassociation spectra of cold alkaline earth atoms

Abstract

Narrow s-wave features with subthermal widths are predicted for the ^1Pi_g photoassociation spectra of cold alkaline earth atoms. The phenomenon is explained by numerical and analytical calculations. These show that only a small subthermal range of collision energies near threshold contributes to the s-wave features that are excited when the atoms are very far apart. The resonances survive thermal averaging, and may be detectable for Ca cooled near the Doppler cooling temperature of the 4^1P <- 4^1S laser cooling transition.

5 pages, RevTex, 4 eps figures embedded

References in corpus (1)

• Calculations of collisions between cold alkaline earth atoms in a weak laser field

Cited by in corpus (4)

• Properties of metastable alkaline-earth-metal atoms calculated using an accurate effective core potential
• Photoassociation spectroscopy of cold alkaline earth atoms near the intercombination line
• Dialogue on analytical and ab initio methods in attoscience
• Robust two-dimensional subrecoil Raman cooling by adiabatic transfer in a tripod atomic system