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Physical Review A - Atomic, Molecular, and Optical Physics


A theoretical analysis was performed to interpret the spectra of long-range helium dimers produced by photoassociation in an ultracold gas of metastable helium atoms. The vibrational spectra for the purely long range molecular states was also calculated using adiabatic potentials obtained from perturbation theory. The results confirmed the lifetime of the 23P atomic state. The experimental data allowed for a test of tiny vibration-induced couplings between electronic and nuclear degrees of freedom.



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