Precision measurements and computations of transition energies in rotationally cold triatomic hydrogen ions up to the midvisible spectral range

First-principles computations and experimental measurements of transition energies are carried out for vibrational overtone lines of the triatomic hydrogen ion H(3)(+) corresponding to floppy vibrations high above the barrier to linearity. Action spectroscopy is improved to detect extremely weak vis...

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Bibliographic Details
Published in:Physical review letters 2012-01, Vol.108 (2), p.023002-023002, Article 023002
Main Authors: Pavanello, Michele, Adamowicz, Ludwik, Alijah, Alexander, Zobov, Nikolai F, Mizus, Irina I, Polyansky, Oleg L, Tennyson, Jonathan, Szidarovszky, Tamás, Császár, Attila G, Berg, Max, Petrignani, Annemieke, Wolf, Andreas
Format: Article
Language:English
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Summary:First-principles computations and experimental measurements of transition energies are carried out for vibrational overtone lines of the triatomic hydrogen ion H(3)(+) corresponding to floppy vibrations high above the barrier to linearity. Action spectroscopy is improved to detect extremely weak visible-light spectral lines on cold trapped H(3)(+) ions. A highly accurate potential surface is obtained from variational calculations using explicitly correlated Gaussian wave function expansions. After nonadiabatic corrections, the floppy H(3)(+) vibrational spectrum is reproduced at the 0.1 cm(-1) level up to 16600 cm(-1).
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.108.023002