Determination of dipole and quadrupole hyperfine structure in the excited B2Σ state of Ca79Br and Ca81Br

1981 ◽  
Vol 59 (10) ◽  
pp. 1308-1312 ◽  
Author(s):  
W. J. Childs ◽  
David R. Cok ◽  
L. S. Goodman
Keyword(s):  
Hyperfine Structure ◽  
Ground State ◽  
Molecular Beam ◽  
Double Resonance ◽  
Beam Laser ◽  
Hyperfine Constants

Recent molecular-beam, laser-rf, double-resonance measurements of the hfs intervals in the X2Σ ground state of CaBr have been supplemented with laser scans of the hfs of sub-Doppler B ↔ X optical lines in a molecular beam to provide greatly improved values for the hfs constants of the excited B2Σ state. The values b = 11.8 ± 0.4 MHz and eqQ = 30.4 ± 1.0 MHz are reported for the hyperfine constants of Ca79Br in its B2Σ2, ν′ = 0 state; c is found to have a magnitude not more than about 10 MHz, and may be negative.

Hyperfine and spin–rotational structure of CaBr X 2Σ (v = 0) by molecular‐beam laser‐rf double resonance

1981 ◽  
Vol 75 (2) ◽  
pp. 501-507 ◽  
Author(s):  
W. J. Childs ◽  
David R. Cok ◽  
G. L. Goodman ◽  
L. S. Goodman
Keyword(s):  
Molecular Beam ◽  
Double Resonance ◽  
Rotational Structure ◽  
Beam Laser

Determination of a High Potential Barrier Hindering Internal Rotation from the Ground State Spectrum. The Methylbarrier of Ethylbromide

1985 ◽  
Vol 40 (6) ◽  
pp. 575-587 ◽  
Author(s):  
J. Gripp ◽  
H. Dreizler ◽  
R. Schwarz
Keyword(s):  
Hyperfine Structure ◽  
Internal Rotation ◽  
Potential Barrier ◽  
Ground State ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Vibrational Ground State ◽  
Distortion Analysis ◽  
High Potential Barrier

For ethylbromide a determination of the parameters of internal rotation is given derived from the rotational spectrum of the torsional and vibrational ground state. The Br-hyperfine structure is reanalysed with higher precision. As high J transitions were measured a centrifugal distortion analysis was necessary.

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