High-resolution studies of perturbations in the 410 band of thioformaldehyde

1985 ◽  
Vol 63 (7) ◽  
pp. 933-936 ◽  
Author(s):  
K. H. Fung ◽  
J. C. Petersen ◽  
D. A. Ramsay
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Double Resonance ◽  
Optical Double Resonance

The perturbations in the 41 level of the Ã1A2 excited state of thioformaldehyde (H2CS) are shown to be produced by interactions with the 2131, 4262, and 63 levels of the ã3A2 state.Some of these perturbations have been studied with megahertz resolution using the techniques of intermodulated fluorescence and microwave-optical double resonance. A particularly clear example involving hyperfine levels is found in the interaction of the 170.17 (41) level of the Ã1A2 state with the 17 181,18 (4262) level of the ã3A2 state.

Microwave—optical double resonance in the A1A2 excited state of thioformaldehyde

1984 ◽  
Vol 103 (4) ◽  
pp. 266-270 ◽  
Author(s):  
J.C. Petersen ◽  
D.A. Ramsay ◽  
T. Amando
Keyword(s):  
Excited State ◽  
Double Resonance ◽  
Optical Double Resonance

Microwave-optical double resonance of HNO in the Ã1A″(000) state

1984 ◽  
Vol 62 (12) ◽  
pp. 1731-1737 ◽  
Author(s):  
J. C. Petersen ◽  
S. Saito ◽  
T. Amano ◽  
D. A. Ramsay
Keyword(s):  
Excited State ◽  
Radio Frequency ◽  
Ground State ◽  
Double Resonance ◽  
Magnetic Effect ◽  
Resonance Spectroscopy ◽  
Centrifugal Distortion ◽  
Rotational Constants ◽  
Optical Double Resonance ◽  
Double Resonance Spectroscopy

Twenty-nine rotational transitions of HNO in the Ã1A″(000) excited state have been measured by microwave-optical, and radio-frequency-optical double resonance spectroscopy. Most of the observed lines are found to be perturbed by a few to a few hundred MHz. Improved values have been obtained for the rotational constants B and C and for the centrifugal distortion constant δJ. MODR lines have also been observed between levels of the Ã1A″ excited state, high rovibronic levels of the [Formula: see text] ground state, and levels of the ã3A″ state. One of the lines shows a larger magnetic effect, suggesting a perturbation by a level of the ã3A″ state.

scholarly journals Precise Measurement of Hyperfine Structure of Cesium 7S1/2 Excited State

2020 ◽  
Vol 10 (2) ◽  
pp. 525 ◽  
Author(s):  
Yunhui He ◽  
Jiabei Fan ◽  
Liping Hao ◽  
Yuechun Jiao ◽  
Jianming Zhao
Keyword(s):  
Excited State ◽  
Hyperfine Structure ◽  
Precise Measurement ◽  
Double Resonance ◽  
Probe Laser ◽  
Transition Line ◽  
Coupling Laser ◽  
Electro Optic ◽  
Fabry Perot ◽  
Optical Double Resonance

We present a precise measurement of the hyperfine structure of cesium 7 S 1 / 2 excited state by employing electromagnetically induced spectroscopy (EIS) with a cesium three-level cascade ( 6 S 1 / 2 − 6 P 3 / 2 − 7 S 1 / 2 ) atom in a room temperature vapor cell. A probe laser, λ p = 852 nm, was coupled to a transition | 6 S 1 / 2 ⟩ → | 6 P 3 / 2 ⟩ , related frequency locked to the resonance hyperfine transition of | 6 S 1 / 2 ⟩ → | 6 P 3 / 2 ⟩ with a Fabry–Perot (FP) cavity and an electro-optic modulator (EOM). A coupling laser, λ c = 1470 nm, drove the | 6 P 3 / 2 ⟩ → | 7 S 1 / 2 ⟩ transition with the frequency scanned over the | 6 P 3 / 2 ⟩ → | 7 S 1 / 2 ⟩ transition line. The hyperfine level interval was extracted to be 2183.61 ± 0.50 MHz by analyzing EIS spectroscopy. The optical–optical double-resonance (OODR) spectroscopy is also presented for comparison, with the corresponding value of the hyperfine level interval being 2183.48 MHz ± 0.04 MHz, and the measured hyperfine splitting of excited 7 S 1 / 2 state is shown to be in excellent agreement with the previous work.

High resolution observation of microwave‐optical double resonance in NO2

1974 ◽  
Vol 60 (3) ◽  
pp. 1158-1166 ◽  
Author(s):  
Richard Solarz ◽  
Donald H. Levy ◽  
Koichi Abe ◽  
R. F. Curl
Keyword(s):  
High Resolution ◽  
Double Resonance ◽  
Resolution Observation ◽  
Optical Double Resonance ◽  
High Resolution Observation
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