Improved Frequencies of Rotational Transitions of52CrH in the6Σ+Ground State

2006 ◽  
Vol 637 (2) ◽  
pp. 1143-1147 ◽  
Author(s):  
Jeremy J. Harrison ◽  
John M. Brown ◽  
DeWayne T. Halfen ◽  
Lucy M. Ziurys
Keyword(s):  
Ground State ◽  
Rotational Transitions

scholarly journals Line strengths of rovibrational and rotational transitions within the X3Σ− ground state of NH

2014 ◽  
Vol 141 (5) ◽  
pp. 054310 ◽  
Author(s):  
James S. A. Brooke ◽  
Peter F. Bernath ◽  
Colin M. Western ◽  
Marc C. van Hemert ◽  
Gerrit C. Groenenboom
Keyword(s):  
Ground State ◽  
Rotational Transitions ◽  
Line Strengths

scholarly journals J-Dependence of T2-Parameters for Rotational Transitions of SO2 and CH3OH in K-Band

1985 ◽  
Vol 40 (7) ◽  
pp. 683-685 ◽  
Author(s):  
S. C. Mehrotra ◽  
H. Dreizler ◽  
H. Mäder
Keyword(s):  
Fourier Transform ◽  
Quantum Number ◽  
Ground State ◽  
Significant Variation ◽  
Vibrational State ◽  
Rotational Quantum Number ◽  
Fourier Transform Spectrometer ◽  
Ground Vibrational State ◽  
Rotational Transitions ◽  
Upper Level

With the help of a microwave Fourier transform spectrometer in the range from 18 GHz to 26 GHz, the coefficients ß for the linear pressure depedence of collisional dephasing rates 1/T2 have been determined by the transient emission technique for fourteen pure rotational transitions of SO2 with 5 ≦ J' ≦ 66 in the ground vibrational state, twelve transitions with 8 ≦ J' ≦ 62 in the first excited bending vibrational state, and twelve transitions of methanol with 2 ≦ J' ≦ 11, where J' is the rotational quantum number of the upper level of a transition. The T2-parameter ß for the transition J(K-, K+) - 49(4, 46 ) - 48(5, 43) of SO2 in the ground state shows an anomalous behaviour, whereas the values for all other transitions show a J-dependence in accordance with previous results. No significant variation of T2-parameters with J has been found for the rotational transitions of CH3OH.

The ν3 fundamental of silicon tetrafluoride. Spectroscopy with laser sidebands

1989 ◽  
Vol 67 (5) ◽  
pp. 532-542 ◽  
Author(s):  
L. Jörissen ◽  
H. Prinz ◽  
W. A. Kreiner ◽  
Ch. Wenger ◽  
G. Pierre ◽  
...  
Keyword(s):  
Excited State ◽  
Radio Frequency ◽  
Ground State ◽  
Double Resonance ◽  
Sixth Order ◽  
Silicon Tetrafluoride ◽  
Rotational Transitions

The ν3 fundamental of 28SiF4 has been investigated with laser sidebands and infrared radio-frequency double resonance. From 165 infrared and 206 pure rotational transitions, 10 ground state and 22 excited state constants have been determined. The calculation was performed with a Hamiltonian developed up to sixth order.

The Microwave Spectrum of trans-2,3-Dimethyloxirane in Torsional Excited States

1996 ◽  
Vol 51 (8) ◽  
pp. 923-932 ◽  
Author(s):  
H. Hartwig ◽  
H. Dreizler
Keyword(s):  
Internal Rotation ◽  
Potential Function ◽  
Excited States ◽  
Ground State ◽  
Microwave Spectrum ◽  
Rotation Axes ◽  
Direction Cosines ◽  
Rotational Transitions ◽  
Good Agreement

Abstract The microwave spectrum of trans-2,3-dimethyloxirane (CH3CHOCHCH3) in the excited tor-sional states υ17 = 1 and υ33 = 1 has been measured in the range from 8 to 26 GHz and assigned. An analysis of internal rotation splittings of the observed rotational transitions was performed using the internal axis method (or "combined axis method") with a newly developed program accounting for the top-top coupling. The threefold hindering potential V3 and the direction cosines λ g,i of the internal rotation axes i with respect to the principal inertia axes g are in a good agreement with the ground state values. Additionally, the sixfold hindering parameter V6 was found to be - 0.2600(12) kJ/mol. The value of the parameter V′12 describing the top-top coupling in the potential function (via V′12 sin 3 τ1 sin 3 τ2), was determined to -0.4240(6) kJ/mol.

Rotational Energy Transfer within the A1Σu+ State of Na2 Induced by Collisions with (2S1/2) Na

2007 ◽  
Vol 62 (3-4) ◽  
pp. 176-178
Author(s):  
Rami Haj Mohamad ◽  
Khaled Hussein ◽  
Abdel-Monhem Nachabé
Keyword(s):  
Energy Transfer ◽  
Cross Section ◽  
Cross Sections ◽  
Ground State ◽  
Rhodamine 6G ◽  
Rotational Energy ◽  
Spectral Lines ◽  
Rotational Energy Transfer ◽  
Rotational Transitions ◽  
Electronic Ground

The (v’ = 34, J’ = 14) level of the A1Σ+u electronic state of Na2 has been selectively populated by excitation with the 578.1 nm line of a ring dye-laser with rhodamine 6G. Through collisions with (2S1/2) Na atoms, energy is transferred to neighbouring rotational levels in Na2, and the density of these levels is determined by observing the fluorescence to the electronic ground state. From previous measurements of the lifetime of the A1Σ+u state and new measurements of the intensities of collision-induced spectral lines, absolute collision cross-sections for all rotational transitions up to ΔJ = ±6 have been obtained; the total cross-section for all rotational transitions observed is: rotσtotal = 0.41 nm2.

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