Temperature dependence of spectral-line shifts in pressure broadening

1990 ◽  
Author(s):  
W. C. Kreye ◽  
J. F. Kielkopf
Keyword(s):  
Spectral Line ◽  
Temperature Dependence ◽  
Pressure Broadening

Experimental and theoretical CO2–Ar pressure-broadening cross sections and their temperature dependence

2001 ◽  
Vol 3 (18) ◽  
pp. 3924-3933 ◽  
Author(s):  
F. Thibault ◽  
B. Calil ◽  
J. Buldyreva ◽  
M. Chrysos ◽  
J.-M. Hartmann ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Cross Sections ◽  
Pressure Broadening

Temperature Dependence of N2-Relaxation of Rotational Lines of Propionitrile

1992 ◽  
Vol 47 (9) ◽  
pp. 999-1002 ◽  
Author(s):  
H.-W. Nicolaisen ◽  
H. Mäder ◽  
F. Rohart
Keyword(s):  
Temperature Dependence ◽  
Pressure Dependence ◽  
Decay Rates ◽  
Rotational Relaxation ◽  
Pressure Broadening ◽  
Ambient Temperatures

AbstractThe temperature dependence of the rotational relaxation of propionitrile, CH3CH2C15N, has been investigated by means of microwave transient emission signals. From analysis of the pressure dependence of the coherence decay rates for the rotational lines (J, K-, K+) = (2, 0, 2)-(3, 0, 3), (2,1, 2)-(3, 1, 3), and (2, 2, l)-(3, 2, 2) pressure broadening parameters have been derived for mixtures with nitrogen in the 210-300 K range and for the pure gas at ambient temperatures

Temperature dependence of the spectral line width for complex europium compounds in solutions

1986 ◽  
Vol 44 (2) ◽  
pp. 156-159
Author(s):  
N. N. Mit'kina ◽  
R. A. Puko ◽  
T. I. Razvina ◽  
V. V. Kuznetsova ◽  
M. R. Posledovich
Keyword(s):  
Spectral Line ◽  
Temperature Dependence ◽  
Line Width ◽  
Spectral Line Width

scholarly journals Numerical Simulation of Granular Convection: Effects on Photospheric Spectral Line Profiles

1980 ◽  
Vol 51 ◽  
pp. 213-224
Author(s):  
Åke Nordlund
Keyword(s):  
Spectral Line ◽  
Line Strength ◽  
Blue Shift ◽  
Spectral Lines ◽  
Line Profiles ◽  
Pressure Broadening ◽  
Solar Granulation ◽  
Velocity Fluctuations ◽  
Excitation Potential ◽  
On Line

AbstractThe results of numerical simulations of the solar granulation are used to investigate the effects on photospheric apectral lines of the correlated velocity and temperature fluctuations of the convective granular motions. It is verified that the granular velocity field is the main cause for the observed broadening and strengthening of photospheric spectral lines relative to values expected from pure thermal and pressure broadening. These effects are normally referred to as being due to “macro-turbulence” and “micro-turbulence”, respectively. It is also shown that the correlated temperature and velocity fluctuations produce a “convective blue shift” in agreement with the observed blue shift of photospheric spectral lines. Reasons are given for the characteristic shapes of spectral line bisectors, and the dependence of these shapes on line strength, excitation potential, and center to limb distance are discussed.

Temperature dependence of the spectral line narrowing and photoluminescence of MEH-PPV

2000 ◽  
Vol 111-112 ◽  
pp. 531-534 ◽  
Author(s):  
A.K Sheridan ◽  
J.M Lupton ◽  
I.D.W Samuel ◽  
D.D.C Bradley
Keyword(s):  
Spectral Line ◽  
Temperature Dependence ◽  
Line Narrowing ◽  
Spectral Line Narrowing

ERROR ESTIMATION FOR PRESSURE BROADENING COEFFICIENT FROM FITTING OVERLAPPED SPECTRAL LINE WITH VOIGT PROFILE

2005 ◽  
Vol 19 (05) ◽  
pp. 239-247
Author(s):  
JIE-LI LIN ◽  
HONG LU
Keyword(s):  
Spectral Line ◽  
Error Estimation ◽  
Spectral Lines ◽  
Pressure Broadening ◽  
The Real ◽  
Voigt Profile ◽  
Two Component ◽  
Relative Errors ◽  
Center Distance

A series of relative errors ε of the pressure broadening coefficient γfit with respect to the real one γ0 from fitting overlapped spectrum which are composed of two lines with the Voigt profile, are deduced and analyzed in detail for different pressure ranges. ε is found to be related with the value of γ0 and the spectral center distance δυ0 of the two component spectral lines which are not resolved. The influence of δυ0, pressures P and γ0 on ε is discussed. This work can be taken as a useful reference for the analysis of the observed spectrum which is overlapped by two lines to achieve more precise results of γfit.

scholarly journals Pressure broadening of spectral lines and van der Waals forces I—Influence of argon on the mercury resonance line

1937 ◽  
Vol 158 (893) ◽  
pp. 212-229 ◽  
Keyword(s):  
Spectral Line ◽  
Intensity Distribution ◽  
Resonance Line ◽  
Van Der Waals ◽  
Van Der Waals Forces ◽  
Spectral Lines ◽  
Molecular Spectra ◽  
Pressure Broadening ◽  
Single Atoms ◽  
Intensity Measurements

It is the purpose of this and the following paper to consider the type of broadening of a spectral line, produced by approaches of other atoms to the radiating atom, which we shall call throughout “transits". The aspect with which we are particularly concerned is the transits of single atoms producing the wing of the broadened line. The intensity distribution in spectra of this type, which are intermediate between ordinary pressure broadening and continuous molecular spectra, can be interpreted in a simple way, yielding results on the van der Waals forces. The first paper gives an account of intensity measurements in the single transit region of the mercury line 2537 A. broadened by the admixture of argon.

Temperature dependence of pressure broadening and shifts of acetylene at 1550 nm by He, Ne, and Ar

2007 ◽  
Vol 90 (2) ◽  
pp. 255-262 ◽  
Author(s):  
K.S. Bond ◽  
N.D. Collett ◽  
E.P. Fuller ◽  
J.L. Hardwick ◽  
E.E. Hinds ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Pressure Broadening ◽  
And Shifts
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