Theory of the optical spectrum of Na 2 on 4 He droplets : effects of the zero - point energy of the nearest atoms
نویسنده
چکیده
An analytical theory of the optical transitions of a molecule bound at the surface of a He droplet is developed for the case of a strong softening of the excited-state nearest neighbor dynamics. The optical bandwidth is found to be determined by the zero-point kinetic energy released at the transition. The theory is applied to the triplet-triplet optical transition in Na2 molecule, for which an asymmetric vibronic band with no pronounced zero-phonon line is predicted, in good agreement with the experiment. PACS. 68.43.Pq Adsorbate vibrations – 67.25.-k He
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