Laboratory spectroscopy of H+3

Benjamin J. McCall

doi:10.1098/rsta.2000.0655

Laboratory spectroscopy of H⁺₃

Benjamin J. McCall

Research output: Contribution to journal › Article › peer-review

Abstract

The experimental determination of the low-lying rovibrational energy levels of H⁺₃ using high-resolution, high-sensitivity infrared laser spectroscopy has confirmed this ion's equilateral triangle equilibrium geometry, provided direct information on its quantum mechanical characteristics, and enabled its extensive study in planetary ionospheres and in the interstellar medium. Since the discovery of the ν₂ ← 0 fundamental band, the laboratory spectroscopy of H⁺₃ has been pushed to higher energies through the study of vibrational hot bands, overtones, forbidden bands and combination bands. We review the 20 years of laboratory spectroscopy of this important ion, discuss our recent work on the ν₁ + 2ν²₂ ← 0 and 2ν₁ + ν₂ ← 0 bands, and examine the prospects for the future of H⁺₃ spectroscopy.

Original language	English (US)
Pages (from-to)	2385-2401
Number of pages	17
Journal	Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume	358
Issue number	1774
DOIs	https://doi.org/10.1098/rsta.2000.0655
State	Published - 2000
Externally published	Yes

Keywords

Infrared spectroscopy
Molecular ions, h
Plasma spectroscopy

ASJC Scopus subject areas

General Mathematics
General Engineering
General Physics and Astronomy

Online availability

10.1098/rsta.2000.0655

Library availability

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Cite this

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AB - The experimental determination of the low-lying rovibrational energy levels of H+3 using high-resolution, high-sensitivity infrared laser spectroscopy has confirmed this ion's equilateral triangle equilibrium geometry, provided direct information on its quantum mechanical characteristics, and enabled its extensive study in planetary ionospheres and in the interstellar medium. Since the discovery of the ν2 ← 0 fundamental band, the laboratory spectroscopy of H+3 has been pushed to higher energies through the study of vibrational hot bands, overtones, forbidden bands and combination bands. We review the 20 years of laboratory spectroscopy of this important ion, discuss our recent work on the ν1 + 2ν22 ← 0 and 2ν1 + ν2 ← 0 bands, and examine the prospects for the future of H+3 spectroscopy.

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