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.

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.

Pure rotational spectrum of 13CD4 and isotope effects on the tensorial centrifugal-distortion constants of methane

1987 ◽  
Vol 65 (1) ◽  
pp. 32-37 ◽  
Author(s):  
W. A. Kreiner ◽  
P. Müller ◽  
L. Jörissen ◽  
M. Oldani ◽  
A. Bauder
Keyword(s):  
Fourier Transform ◽  
Radio Frequency ◽  
Ground State ◽  
Isotope Effects ◽  
Double Resonance ◽  
Rotational Spectrum ◽  
Centrifugal Distortion ◽  
Theoretical Predictions ◽  
Deuterium Isotope Effects ◽  
Centrifugal Distortion Constants

Infrared-laser – radio-frequency double-resonance experiments and pulsed-microwave Fourier-transform measurements have been performed with 13CD4. From 25 observed ΔJ = 0 transitions in the vibronic ground state, the tensorial centrifugal-distortion constants Dt = 32.6600(12) kHz, H4t = −2.0302(61) Hz, H6t = 1.1692(29) Hz, L4t = 1.201(77) × 10−4 Hz, L6t = −1.353(63) × 10−4 Hz, and L8t = −1.466(46) × 10−4 Hz have been determined. Experimental carbon-13 and deuterium isotope effects on the tensorial centrifugal-distortion constants of methane have been compared with theoretical predictions.

Pure rotational spectrum of SnH4 in the vibrational ground state observed by infrared‐radio frequency double resonance

1986 ◽  
Vol 85 (10) ◽  
pp. 5519-5523 ◽  
Author(s):  
Yasuhiro Ohshima ◽  
Yoshiyasu Matsumoto ◽  
Michio Takami ◽  
Kozo Kuchitsu
Keyword(s):  
Radio Frequency ◽  
Ground State ◽  
Double Resonance ◽  
Rotational Spectrum ◽  
Vibrational Ground State

A model for ground-state and excited-state microwave optical double resonance

1977 ◽  
Vol 64 (1) ◽  
pp. 86-97 ◽  
Author(s):  
Richard F. Wormsbecher ◽  
David O. Harris ◽  
Brian G. Wicke
Keyword(s):  
Excited State ◽  
Ground State ◽  
Double Resonance ◽  
Optical Double Resonance

Infrared – Radio-frequency Double Resonance Observations of Δ J = 0 ‘Forbidden’ Rotational Transitions of SiH4

1975 ◽  
Vol 53 (19) ◽  
pp. 2000-2006 ◽  
Author(s):  
W. A. Kreiner ◽  
T. Oka
Keyword(s):  
Radio Frequency ◽  
Double Resonance ◽  
Laser Cavity ◽  
Infrared Laser ◽  
Microwave Spectrum ◽  
Centrifugal Distortion ◽  
Fundamental Band ◽  
Rotational Transitions ◽  
Centrifugal Distortion Constants

The radio-frequency and microwave spectrum of SiH4 corresponding to ΔJ = 0 ‘forbidden’ rotational transitions between the centrifugal distortion multiplets of levels has been studied by using the method of infrared–microwave double resonance in a laser cavity. Coincidences between the v4 fundamental band of SiH4 and N2O infrared laser lines in the 10 μm region have been used. Seven double resonance signals have been found and four of them were assigned to the J = 5, and J = 9 'forbidden' rotational transitions. From the measured frequencies, the quartic and sextic centrifugal distortion constants were determined as D1 = 74 861 ± 15 Hz, H4t = −7.14 ± 0.3 Hz, and H6t = 6.57 ± 1.1 Hz.

Observation of ground state rotational transitions in silicon tetrafluoride

1986 ◽  
Vol 120 (1) ◽  
pp. 233-235 ◽  
Author(s):  
L. Jörissen ◽  
W.A. Kreiner ◽  
Y-T. Chen ◽  
T. Oka
Keyword(s):  
Ground State ◽  
Silicon Tetrafluoride ◽  
Rotational Transitions

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

Ground State and Excited State H-Atom Temperatures in a Microwave Plasma Diamond Deposition Reactor

1996 ◽  
Vol 6 (9) ◽  
pp. 1167-1180 ◽  
Author(s):  
A. Gicquel ◽  
M. Chenevier ◽  
Y. Breton ◽  
M. Petiau ◽  
J. P. Booth ◽  
...  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Microwave Plasma ◽  
Diamond Deposition
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