Precision Measurements and Computations of Transition Energies in Rotationally Cold Triatomic Hydrogen Ions up to the Midvisible Spectral Range
| Autor: | Nikolai F. Zobov, Tamás Szidarovszky, Irina I. Mizus, Alexander Alijah, Andreas Wolf, Attila G. Császár, Oleg L. Polyansky, Michele Pavanello, Jonathan Tennyson, Max H. Berg, Ludwik Adamowicz, Annemieke Petrignani |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Physical Review Letters |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.108.023002 |
| Popis: | First-principles computations and experimental measurements of transition energies are carried out for vibrational overtone lines of the triatomic hydrogen ion ${\mathrm{H}}_{3}^{+}$ 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 ${\mathrm{H}}_{3}^{+}$ ions. A highly accurate potential surface is obtained from variational calculations using explicitly correlated Gaussian wave function expansions. After nonadiabatic corrections, the floppy ${\mathrm{H}}_{3}^{+}$ vibrational spectrum is reproduced at the $0.1\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$ level up to $16\text{ }600\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$. |
| Databáze: | OpenAIRE |
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