Abstract
Arn+H3 ions are produced in a laser vaporization source, and their stability against black-body radiation is tested in an FT-ICR mass spectrometer. Using a magnesium target and hydrogen doped argon as carrier gas, Arn+H3 are formed with n = 1–3 in large quantities and traces of n = 4. Arn+H, n = 1–3 are also present. Both Ar3+H3 and Ar2+H3 are heated by room temperature black-body radiation and decay on a timescale of seconds. The observed rate constants are compared with recently calculated IR spectra. The results are in agreement with the presence of strong IR absorptions around 350 cm−1, which may serve as a fingerprint for the identification of H3+ in solid argon.
Published Version
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