Determination of thermodynamic functions from absolute intensity measurements in microwave spectroscopy

1973 ◽  
Vol 95 (19) ◽  
pp. 6182-6190 ◽  
Author(s):  
R. F. Curl ◽  
Tatsuya. Ikeda ◽  
R. S. Williams ◽  
Sharron. Leavell ◽  
L. H. Scharpen
Keyword(s):  
Thermodynamic Functions ◽  
Absolute Intensity ◽  
Microwave Spectroscopy ◽  
Intensity Measurements

ChemInform Abstract: DETERMINATION OF THERMODYNAMIC FUNCTIONS FROM ABSOLUTE INTENSITY MEASUREMENTS IN MICROWAVE SPECTROSCOPY

1973 ◽  
Vol 4 (47) ◽  
pp. no-no
Author(s):  
R. F. CURL ◽  
TATSUYA IKEDA ◽  
R. S. WILLIAMS ◽  
SHARRON LEAVELL ◽  
L. H. SCHARPEN
Keyword(s):  
Thermodynamic Functions ◽  
Absolute Intensity ◽  
Microwave Spectroscopy ◽  
Intensity Measurements

Double Resonance Modulation as a Standard Technique in Microwave Spectroscopy II. Line Shape and Integrated Intensity

1975 ◽  
Vol 30 (12) ◽  
pp. 1756-1764
Author(s):  
Otto L. Stiefvater
Keyword(s):  
Stark Effect ◽  
Double Resonance ◽  
Standard Technique ◽  
Microwave Spectroscopy ◽  
Pump Radiation ◽  
Absolute Value ◽  
Line Shapes ◽  
Intensity Measurements ◽  
Integrated Intensity

Abstract It is shown that there occur two easily distinguishable line shapes in DRM spectroscopy. These reflect the change of the integrated intensity of the signal transition when pump radiation is applied. They readily permit deductions concerning the position of the shared energy level. This result is useful for the analysis of complicated spectra, as is illustrated with examples.An expression is derived which permits the determination of the integrated intensity of absorption lines by DRM techniques alone. It does not require knowledge of the absolute value of the pump power and provides, therefore, a convenient basis for relative intensity measurements without recurrence to Stark effect modulation.

scholarly journals Remarks on the Efficiencies of Geiger, Proportional, and Cintillation Counters with Application to the Absolute Intensity of Characteristic X-Radiation

1964 ◽  
Vol 17 (2) ◽  
pp. 200
Author(s):  
V Metchnik
Keyword(s):  
Scintillation Counter ◽  
Absolute Intensity ◽  
Geiger Counter ◽  
Counting Efficiency ◽  
Side Window ◽  
Intensity Measurements ◽  
Quantum Counting ◽  
The Absolute ◽  
Good Agreement

The measurements of the absolute intensities of Ou Ka radiation, isolated by means of balanced nickel and iron filters,. necessitated the determination of the quantum counting efficiency of three types of detectors: an end� window argon-filled Geiger counter, a two side-window, xenon-filled proportional counter, and a scintillation counter with NaITI crystal. It is shown that, provided the necessary corrections are made, results of absolute intensity measurements obtained with these three detectors show good agreement.

Determination of the Excitation Temperature in a Nonthermodynamic-Equilibrium High-Pressure Helium Microwave Plasma Torch

1997 ◽  
Vol 51 (6) ◽  
pp. 778-784 ◽  
Author(s):  
M. C. Quintero ◽  
A. Rodero ◽  
M. C. García ◽  
A. Sola
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Torch ◽  
Microwave Plasma ◽  
Absolute Intensity ◽  
Atomic State ◽  
Excitation Temperature ◽  
State Distribution ◽  
Boltzmann Plot ◽  
Intensity Measurements

This paper analyzes the influence of the departure from thermodynamic equilibrium on three spectroscopic methods for determining the excitation temperature: the classical Boltzmann plot method, the method of absolute intensity measurements, and the method of the ratio of atomic to ionic lines for one element. Use of these methods is illustrated with experiments conducted in a helium microwave plasma in nonthermodynamic equilibrium produced by an axial injection torch at atmospheric pressure. The excitation temperature was determined at a variable microwave power and different positions along the flame. The results are discussed in terms of the atomic-state distribution function (ASDF) calculated for the plasma.

scholarly journals Experimental determination of absolute intensities in the solar XUV spectrum

1965 ◽  
Vol 23 ◽  
pp. 29-30
Author(s):  
H. E. Hinteregger
Keyword(s):  
Solar Physics ◽  
Ultra Violet ◽  
Absolute Intensity ◽  
Space Vehicles ◽  
Space Technology ◽  
Experimental Art ◽  
Intensity Measurements ◽  
Ionization Detectors ◽  
New Phase

Experimental problems of absolute intensity measurements of solar electromagnetic radiation in the extreme ultra-violet (EUV) and soft X-ray region of the spectrum (designated cumulatively as “XUV” for brevity) are reviewed. From an evaluation of existing rocket and satellite data together with existing projects and goals of future observations from space vehicles, it is suggested that the numerous associated practical problems be devided into two major areas, namely (a) the general experimental art of heterochromatic absolute XUV spectrophotometry in the laboratory and (b) specific problems characteristic of the objectives of solar physics as well as existing restrictions of space technology. Within the first area (a) emphasis is placed on recent progress toward justified reliance on ionization detectors without necessary connection to source standards. For the second area (b), emphasis is placed on the immediate need to have existing exploratory observations followed by a new phase of more systematic experiments of increased accuracy.

STRUCTURE DETERMINATION OF 5 MEMBERED SILANE RINGS USING MICROWAVE SPECTROSCOPY

2018 ◽  
Author(s):  
Frank Marshall ◽  
G. Grubbs II ◽  
Gamil Guirgis ◽  
Theodore Carrigan-Broda ◽  
Grier Jones ◽  
...  
Keyword(s):  
Structure Determination ◽  
Microwave Spectroscopy
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