Influence of a Feshbach resonance on the photoassociation of LiCs. Deiglmayr, J., Pellegrini, P., Grochola, A., Repp, M., Cote, R., Dulieu, O., Wester, R., & Weidemueller, M. New Journal of Physics, May, 2009. WOS:000266234500025
doi  abstract   bibtex   
We analyze the formation of ultracold (7)Li(133)Cs molecules in the rovibrational ground state through photoassociation into the B(1)Pi state, which has recently been reported (Deiglmayr et al 2008 Phys. Rev. Lett. 101 133004). Absolute rate constants for photoassociation at large detunings from the atomic asymptote are determined and are found to be surprisingly large. The photoassociation process is modeled using a full coupled-channel calculation for the continuum state, taking all relevant hyperfine states into account. The enhancement of the photoassociation rate is found to be caused by an 'echo' of the triplet component in the singlet component of the scattering wave function at the inner turning point of the lowest triplet a(3)Sigma(+) potential. This perturbation can be ascribed to the existence of a broad Feshbach resonance at low scattering energies. Our results elucidate the important role of couplings in the scattering wave function for the formation of deeply bound ground state molecules via photoassociation.
@article{deiglmayr_influence_2009,
	title = {Influence of a {Feshbach} resonance on the photoassociation of {LiCs}},
	volume = {11},
	issn = {1367-2630},
	doi = {10.1088/1367-2630/11/5/055034},
	abstract = {We analyze the formation of ultracold (7)Li(133)Cs molecules in the   rovibrational ground state through photoassociation into the B(1)Pi   state, which has recently been reported (Deiglmayr et al 2008 Phys. Rev.   Lett. 101 133004). Absolute rate constants for photoassociation at large   detunings from the atomic asymptote are determined and are found to be   surprisingly large. The photoassociation process is modeled using a full   coupled-channel calculation for the continuum state, taking all relevant   hyperfine states into account. The enhancement of the photoassociation   rate is found to be caused by an 'echo' of the triplet component in the   singlet component of the scattering wave function at the inner turning   point of the lowest triplet a(3)Sigma(+) potential. This perturbation   can be ascribed to the existence of a broad Feshbach resonance at low   scattering energies. Our results elucidate the important role of   couplings in the scattering wave function for the formation of deeply   bound ground state molecules via photoassociation.},
	journal = {New Journal of Physics},
	author = {Deiglmayr, J. and Pellegrini, P. and Grochola, A. and Repp, M. and Cote, R. and Dulieu, O. and Wester, R. and Weidemueller, M.},
	month = may,
	year = {2009},
	note = {WOS:000266234500025},
	keywords = {Cold chemistry, Cold molecules},
}

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