Petrignani Annemieke, Berg Max H, Grussie Florian, Wolf Andreas, Mizus Irina I, Polyansky Oleg L, Tennyson Jonathan, Zobov Nikolai F, Pavanello Michele, Adamowicz Ludwik
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany.
Institute of Applied Physics, Russian Academy of Science, Ulyanov Street 46, Nizhnii Novgorod 603950, Russia.
J Chem Phys. 2014 Dec 28;141(24):241104. doi: 10.1063/1.4904440.
The visible spectrum of H3(+) is studied using high-sensitivity action spectroscopy in a cryogenic radiofrequency multipole trap. Advances are made to measure the weak ro-vibrational transitions from the lowest rotational states of H3(+) up to high excitation energies providing visible line intensities and, after normalisation to an infrared calibration line, the corresponding Einstein B coefficients. Ab initio predictions for the Einstein B coefficients are obtained from a highly precise dipole moment surface of H3(+) and found to be in excellent agreement, even in the region where states have been classified as chaotic.
