Observation of the infrared spectrum of the helium molecular ion (He-3 He-4)(+)

Details Observation of the infrared spectrum of the helium molecular ion (He-3 He-4)(+) Observation of the infrared spectrum of the helium molecular ion (He-3 He-4)(+)

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvl..59.2055y&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 59, Nov. 2, 1987, p. 2055-2058. Research supported by the Arizona Research Labora

Physics

33

Carbon Monoxide Lasers, Charge Transfer, Helium Plasma, Infrared Spectra, Molecular Ions, Rydberg Series, Ion Beams, Kinetic Energy, Quantum Chemistry, Rotational Spectra

Scientific paper

The Doppler-tuned ion-beam laser-resonance technique is used to observe the vibration-rotation spectrum of the helium molecular ion (He-3 He-4)(+). Nine transitions in the fundamental band have been measured with an uncertainty of 0.0006/cm or 0.3 ppm, an accuracy which exceeds that of the available theory by greater than 3 orders of magnitude. The extensive high-accuracy spectrum has application as a diagnostic for isotopic helium plasmas and possibly for the intersteller detection of He-3.

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