Chemistry: CH4 Rotation Spectrum?

1971 ◽  
Vol 233 (42) ◽  
pp. 127-128
Keyword(s):  
Rotation Spectrum

Tunneling-rotation spectrum of the hydrogen fluoride dimer

1990 ◽  
Vol 141 (2) ◽  
pp. 204-222 ◽  
Author(s):  
S.P. Belov ◽  
E.N. Karyakin ◽  
I.N. Kozin ◽  
A.F. Krupnov ◽  
O.L. Polyansky ◽  
...  
Keyword(s):  
Hydrogen Fluoride ◽  
Rotation Spectrum

Spectral ratio comparison between translation and rotational records from induced seismic events.

2021 ◽  
Author(s):  
Dariusz Nawrocki ◽  
Maciej Mendecki ◽  
Lesław Teper
Keyword(s):  
Seismic Data ◽  
Seismic Station ◽  
Spectral Ratio ◽  
Numerical Differentiation ◽  
Vertical Axis ◽  
Frequency Range ◽  
Signal Ratio ◽  
Seismic Waveforms ◽  
Seismic Tests ◽  
Rotation Spectrum

<p>The seismic observations of the rotational signals are a field of seismology that is constantly developed. The recent research concerns sensors technology and its potential application in seismic tests. This study presents the results of a comparative analysis of rotational and translational seismic records using the horizontal-to-vertical spectral ratio (HVSR) method. In terms of transitional signal ratio, we have used the name of HVSR, but in terms of rotational component spectra, we have introduced a torsion-to-rocking spectral ratio (TRSR) which corresponds to horizontal rotation spectrum to vertical rotation spectrum. It has to be noticed that rotation in the horizontal axes has a vertical character and rotation in the vertical axis has a horizontal character.</p><p>The comparison was carried out between velocity signals of translational and rotational records, as well as, between acceleration signals respectively. All seismic data were recorded by two independent sensors: the rotational seismometer and translational accelerometer at the Imielin station, located in the Upper Silesia Coal Basin (USCB), Poland. The seismic data composed of three-component seismic waveforms related to 56 recorded tremors which were located up to 1,5 km from the seismic station and they resulted from the coal extractions carried out in the neighboring coal mines. The rotational acceleration was obtained by numerical differentiation and the translational velocity was produced by numerical integration.</p><p>The conducted spectral analyses allowed to estimate the range of frequency in which the rotational HVSR and the corresponded translational HVSR are comparable. The analysis of HVSR/TRSR curves (in the selected frequency range of 1Hz to 10Hz) showed a strong correlation between the spectral ratios for the velocity signals (translational and rotational) in the frequency range of 1Hz to 2Hz. Respectively, the comparison of the accelerometer signals indicated the correlation between HVSR/TRSR curves in the frequency range of 1Hz to 3Hz. Moreover, both of the TRSR (for velocity and acceleration) showed additional maxima in the same frequency range of 3Hz to 5Hz. These relatively high-frequency maxima did not correspond to translational spectra.  </p>

Acetonen-radical cation internal rotation spectrum: The torsional potential surface

2000 ◽  
Vol 112 (6) ◽  
pp. 2762-2768 ◽  
Author(s):  
Dana A. Shea ◽  
Lionel Goodman ◽  
Michael G. White
Keyword(s):  
Internal Rotation ◽  
Radical Cation ◽  
Potential Surface ◽  
Torsional Potential ◽  
Rotation Spectrum

scholarly journals Accurateab initiopotential energy curve of F2. III. The vibration rotation spectrum

2007 ◽  
Vol 127 (20) ◽  
pp. 204313 ◽  
Author(s):  
L. Bytautas ◽  
N. Matsunaga ◽  
T. Nagata ◽  
M. S. Gordon ◽  
K. Ruedenberg
Keyword(s):  
Energy Curve ◽  
Vibration Rotation ◽  
Rotation Spectrum

scholarly journals Observations of the Outer Atmospheric Regions of α Orionis

1980 ◽  
Vol 51 ◽  
pp. 278-278
Author(s):  
A.P. Bernat ◽  
L. Goldberg
Keyword(s):  
Observational Studies ◽  
Blue Shift ◽  
Centre Of Mass ◽  
Astrophysical Journal ◽  
Residual Intensity ◽  
Mass Flows ◽  
Vibration Rotation ◽  
Rotation Spectrum ◽  
Infrared Triplet

AbstractWe present three separate observational studies of mass flows above the photosphere of α Ori (M2 Ia-Ib). The Ca II infrared triplet lines and Hα are asymmetric showing a systematic blue shift with decreasing residual intensity. These lines remain fixed in wavelength although the weak photospheric lines vary by ±4 km/sec. Observations of the 4.6μ vibration-rotation spectrum of CO show two sharp, cold components expanding at velocities of 10 and 17 km/sec relative to the centre of mass. Direct photographs of the shell in the light of KI λ7699 show that the cold shell is asymmetric and extends outward to at least 50”.Details of these studies are either in press or will be submitted to “The Astrophysical Journal”.

Measurement of the ν1 vibration‐rotation spectrum of the thioformyl ion (HCS+) by velocity modulation laser spectroscopy

1985 ◽  
Vol 83 (10) ◽  
pp. 4845-4848 ◽  
Author(s):  
Neil H. Rosenbaum ◽  
Jeffrey C. Owrutsky ◽  
Leslie M. Tack ◽  
Richard J. Saykally
Keyword(s):  
Laser Spectroscopy ◽  
Velocity Modulation ◽  
Vibration Rotation ◽  
Rotation Spectrum
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