Energy shifts and forbidden transitions in H-2(+) due to electronic g/u symmetry breaking
Energy shifts and forbidden transitions in H-2(+) due to electronic g/u symmetry breaking
A full account is given of calculations and measurements of transition frequencies and intensities of the forbidden pure rotation transition (v = 19, N = 1)-(v = 19, N = 0) in the ground electronic state (1ssigma(g)) of H-2(+). The transition has measurable intensity because of ortho-para mixing that arises from electronic g/u symmetry breaking caused by the Fermi contact hyperfine interaction. Measurements of the transition were made in both single and double resonance using a fast ion beam/microwave spectrometer. The transition frequency was determined to be at 14 961.7 +/- 1.1 MHz (95% confidence, 5 measurements), in excellent agreement with the theoretical prediction of 14 960 +/- 3 MHz. The intensity of the transition relative to the allowed 1ssigma(g)(v = 19, N = 1)-2psigma(u) (v = 0, N = 2) transition was estimated from the available measurements to be 8000, in reasonable agreement with the theoretically predicted value of approximate to 3000.
homonuclear diatomic-molecules, absorption-coefficients, ion, spectroscopy, collisions, rotation, hydrogen, dissociation, spectrum, states
651-661
Critchley, A.D.J.
c72b57ba-e805-4c93-8258-859d74d62bfd
Hughes, A.N.
c3bfe667-51e0-401a-8d46-57b53bf37f3d
McNab, I.R.
e34346f7-ff3b-490d-9ad3-68c9825bef95
Moss, R.E.
5d410492-850a-4950-85fd-2deb89f60859
2003
Critchley, A.D.J.
c72b57ba-e805-4c93-8258-859d74d62bfd
Hughes, A.N.
c3bfe667-51e0-401a-8d46-57b53bf37f3d
McNab, I.R.
e34346f7-ff3b-490d-9ad3-68c9825bef95
Moss, R.E.
5d410492-850a-4950-85fd-2deb89f60859
Critchley, A.D.J., Hughes, A.N., McNab, I.R. and Moss, R.E.
(2003)
Energy shifts and forbidden transitions in H-2(+) due to electronic g/u symmetry breaking.
Molecular Physics, 101 (4-5), .
(doi:10.1080/0026897021000021886).
Abstract
A full account is given of calculations and measurements of transition frequencies and intensities of the forbidden pure rotation transition (v = 19, N = 1)-(v = 19, N = 0) in the ground electronic state (1ssigma(g)) of H-2(+). The transition has measurable intensity because of ortho-para mixing that arises from electronic g/u symmetry breaking caused by the Fermi contact hyperfine interaction. Measurements of the transition were made in both single and double resonance using a fast ion beam/microwave spectrometer. The transition frequency was determined to be at 14 961.7 +/- 1.1 MHz (95% confidence, 5 measurements), in excellent agreement with the theoretical prediction of 14 960 +/- 3 MHz. The intensity of the transition relative to the allowed 1ssigma(g)(v = 19, N = 1)-2psigma(u) (v = 0, N = 2) transition was estimated from the available measurements to be 8000, in reasonable agreement with the theoretically predicted value of approximate to 3000.
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Published date: 2003
Keywords:
homonuclear diatomic-molecules, absorption-coefficients, ion, spectroscopy, collisions, rotation, hydrogen, dissociation, spectrum, states
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Local EPrints ID: 19937
URI: http://eprints.soton.ac.uk/id/eprint/19937
ISSN: 0026-8976
PURE UUID: 170ffd5a-a9a0-40bd-8bea-dd4b5232c16e
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Date deposited: 24 Feb 2006
Last modified: 15 Mar 2024 06:20
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Author:
A.D.J. Critchley
Author:
A.N. Hughes
Author:
I.R. McNab
Author:
R.E. Moss
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