1994
DOI: 10.1080/00268979400100661
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Measurement of the first excited bending state of Ar-CO using a new concentration modulation technique in the jet

Abstract: Using a new modulation scheme: concentration-frequency double modulation, we were able to observe a new band of Ar-CO in the infrared. We assigned 20 lines of the transition from the ground state, K = 0, to the combination band of Vco = 1 and first excited bending, K = 0 state of Ar-CO. The lower state is identical to the state found by McKellar et al., who measured the perpendicular transitions in the CO fundamental branch of Ar-CO. The band origin of this K: 0 ~ 0 transition is situated at 2154-7460cm -1. Th… Show more

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Cited by 57 publications
(18 citation statements)
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“…18 Increasing attention, both theoretically and experimentally, has been focused on Ar-CO during the last decade, arising, in part, from the prospects of eventually monitoring all the bound van der Waals states. Experimentally, the lower-lying levels comprising the ground state and the excited bending and stretching states are extensively characterized through the work of a number of authors, [2][3][4][5][6][7][8][9][10][11][12][13][14][15] whereas observations of higher-lying states have only recently been reported by Scheele, Lehnig, and Havenith. 16,17 On the theoretical side, a large part of the electronic structure methods, semiempirical 23,28,29,31 as well as ab initio, 24 -27,30 has been employed for calculating IPESs to assist in assigning experimental spectra.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…18 Increasing attention, both theoretically and experimentally, has been focused on Ar-CO during the last decade, arising, in part, from the prospects of eventually monitoring all the bound van der Waals states. Experimentally, the lower-lying levels comprising the ground state and the excited bending and stretching states are extensively characterized through the work of a number of authors, [2][3][4][5][6][7][8][9][10][11][12][13][14][15] whereas observations of higher-lying states have only recently been reported by Scheele, Lehnig, and Havenith. 16,17 On the theoretical side, a large part of the electronic structure methods, semiempirical 23,28,29,31 as well as ab initio, 24 -27,30 has been employed for calculating IPESs to assist in assigning experimental spectra.…”
Section: Introductionmentioning
confidence: 99%
“…The Ar-CO complex can be considered a prototype van der Waals system, as witnessed by the extensive experimental [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] and theoretical [20][21][22][23][24][25][26][27][28][29][30][31] work on its description. For example, the first paper, published in 1978 by Parker and Pack, 20 used Ar-CO as a model system for the development of electron gas methods for calculating intermolecular potential energy surfaces ͑IPESs͒.…”
Section: Introductionmentioning
confidence: 99%
“…The absorp tion spectra of A r-C O complexes in the region of the CO stretching mode were already investigated by Fourier transform and diode laser spectroscopy [6,14,15] and appeared to be convenient for a comparison of the sensitivity of our spectrometer with other methods. Figure 4 presents the Q-branch of the X = 0 -1 band of the CO-stretch of the A r-C O complex.…”
Section: "mentioning
confidence: 99%
“…Later Xu et al 7 extended this work to K values up to 6. Havenith et al 4 measured the first excited bending state of Ar-CO, ( CO , vdW ,K)ϭ(1,1,0) and König et al 6 detected the ͑1,1,1͒ excited bending state that was found to be affected by a strong Coriolis coupling. Later, Xu and McKellar 8 made the first direct observation of the stretching mode.…”
Section: Introductionmentioning
confidence: 99%
“…Due to its relative simplicity it has been widely studied both from the experimental [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] and the theoretical [20][21][22][23][24][25][26][27][28][29][30][31][32] points of view. Because of the very small dipole moment of CO, 0.109 80D, 33 Ar-CO is a challenge both from the experimental and the theoretical points of view.…”
Section: Introductionmentioning
confidence: 99%