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Issue 40, 2020
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Spectroscopic signatures of HHe2+ and HHe3+

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Using two different action spectroscopic techniques, a high-resolution quantum cascade laser operating around 1300 cm−1 and a cryogenic ion trap machine, the proton shuttle motion of the cations HHe2+ and HHe3+ has been probed at a nominal temperature of 4 K. For HHe3+, the loosely bound character of this complex allowed predissociation spectroscopy to be used, and the observed broad features point to a lifetime of a few ps in the vibrationally excited state. For He–H+–He, a fundamental linear molecule consisting of only three nuclei and four electrons, the method of laser-induced inhibition of complex growth (LIICG) enabled the measurement of three accurate rovibrational transitions, pinning down its molecular parameters for the first time.

Graphical abstract: Spectroscopic signatures of HHe2+ and HHe3+

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Article information

03 Sep 2020
29 Sep 2020
First published
29 Sep 2020

Phys. Chem. Chem. Phys., 2020,22, 22885-22888
Article type

Spectroscopic signatures of HHe2+ and HHe3+

M. Töpfer, A. Jensen, K. Nagamori, H. Kohguchi, T. Szidarovszky, A. G. Császár, S. Schlemmer and O. Asvany, Phys. Chem. Chem. Phys., 2020, 22, 22885
DOI: 10.1039/D0CP04649C

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