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Title: Communication: Visible line intensities of the triatomic hydrogen ion from experiment and theory

The visible spectrum of H{sub 3}{sup +} 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 H{sub 3}{sup +} 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 H{sub 3}{sup +} and found to be in excellent agreement, even in the region where states have been classified as chaotic.
Authors:
; ; ;  [1] ; ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany)
  2. Institute of Applied Physics, Russian Academy of Science, Ulyanov Street 46, Nizhnii Novgorod 603950 (Russian Federation)
  3. (United Kingdom)
  4. Department of Physics and Astronomy, University College London, London WC1E 6BT (United Kingdom)
  5. Department of Chemistry, Rutgers University, Newark, New Jersey 07102 (United States)
  6. Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721 (United States)
Publication Date:
OSTI Identifier:
22415398
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CALIBRATION; CHAOS THEORY; DIPOLE MOMENTS; EXCITATION; HYDROGEN IONS 3 PLUS; RADIOWAVE RADIATION; ROTATIONAL STATES; SENSITIVITY; SURFACES; TRAPS; VIBRATIONAL STATES; VISIBLE SPECTRA