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
2015 ◽  
Vol 143 (2) ◽  
pp. 026101 ◽  
Author(s):  
James S. A. Brooke ◽  
Peter F. Bernath ◽  
Colin M. Western

1974 ◽  
Vol 65 ◽  
pp. 359-365
Author(s):  
Kenneth Fox

The existence of a small dipole moment in the vibronic ground state of methane leads to transitions in the microwave spectral range. Frequencies and line strengths appropriate to the atmospheres of the outer planets are presented.


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

1985 ◽  
Vol 40 (7) ◽  
pp. 683-685 ◽  
Author(s):  
S. C. Mehrotra ◽  
H. Dreizler ◽  
H. Mäder

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.


Author(s):  
James S.A. Brooke ◽  
Peter F. Bernath ◽  
Colin M. Western ◽  
Christopher Sneden ◽  
Melike Afşar ◽  
...  

1989 ◽  
Vol 67 (5) ◽  
pp. 532-542 ◽  
Author(s):  
L. Jörissen ◽  
H. Prinz ◽  
W. A. Kreiner ◽  
Ch. Wenger ◽  
G. Pierre ◽  
...  

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.


1996 ◽  
Vol 51 (8) ◽  
pp. 923-932 ◽  
Author(s):  
H. Hartwig ◽  
H. Dreizler

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.


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