Abstract:We report on a study of the I 1 g outer well state of HD. Via a resonance-enhanced XUV + IR (extreme ultraviolet + infrared) excitation scheme, rovibronic levels (v = 0-2, J = 1-4) are populated and probed by pulsed lasers. Level energies are measured with an accuracy of ≈0.03 cm −1 . Due to gerade-ungerade symmetry breaking, the long-range behavior of the I potential in HD deviates from that of H 2 and D 2 . When this deviation is taken into account a semi-empirical potential for the I [Traduit par la rédaction]
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