Analysis of Hollow-Cathode-Discharge-Excited Ar i, Ar ii, and Au i Spectral-Line Profiles Measured with a Fabry–Perot Interferometer*

Kreye, W. C.; Roesler, F. L.

doi:10.1364/josa.60.001100

Cited by 12 publications

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“…In equation (3) sin(nbo) is the main asymmetry term-a zero value yields a Lorentzian line shape, and a negative value produces red asymmetry; Li0 acts as a normalising term; a2/ln 2 is the sum of the squared instrumental Gaussian and Doppler-broadening HWHM; and a1 is the instrumental Lorentzian HWHM (see Kreye and Roesler (1970) for definitions of the HWHM). An asymmetry term p2 (of a different order in U than bo) has been introduced empirically, because, as we show in 0 4, it considerably improves the fit of the interferograms.…”

Section: Theory and Data Analysismentioning

confidence: 99%

“…The pressure-scanned Fabry-Perot (FP) interferometer was described previously by Kreye and Roesler (1970). The central region of the discharge is focused onto the entrance slit of a pre-disperser monochromator whose slits are adjusted to allow a band-pass of 8 A (this large band-pass could be used because the nearest strong K line is about 10 8, distant), The duration of the interferogram scan is about 5 min in order to prevent the picoammeter/strip-chart recorder time constant of about 0.5 s from introducing distortion.…”

Section: Experimental and Measurement Proceduresmentioning

confidence: 99%

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The synthesis and biological activity of 4-[bis(2-chloroethyl)amino]-DL-, L, and D-phenylalanine amides and peptides

Краснов¹,

Zhdanova²,

Смирнова³

1995

Russ. Chem. Rev.

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The effects of temperature upon the Ar-perturbed K I 5802 A emission line (4p 2P3/2-7s 2S1/2) were measured with a Fabry-Perot interferometer. Low-pressure measurements were made between 443 and 760 K in a positive-column discharge. Computer analyses of the line shapes are based upon the semiclassical theory in the impact approximation, and experimental values of shift, width and near-wing asymmetry are obtained. Empirically, the width varies approximately as T o 37*0 O4 . On the basis of an assumed potential form I;,C,/R", the parameters c 6 and C8 are adequate to yield shift and width values in close agreement with experiment. The experimental parameter set is C, erg cm8 and C12=0. The importance of multitemperature measurements in reducing the ambiguity of c 6 and C8 is demonstrated. The existence of the theoretically predicted near-wing red asymmetry is shown, and the experimental value is in quantitative agreement with the calculated value. The calculated K(7s)/Ar potential does not agree with the Baylis-type pseudopotential in which the effective noble-gas atom radius ro corresponds to the ground state; however, a reduction in this radius yields moderately good agreement in the range R 2 19 A, which is shown to be the approximate validity range for the potential derived from these low-pressure measurements.-8.3 X lo-" erg cm', C8 2 8 . 9 x

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Section: Theory and Data Analysismentioning

confidence: 99%

Section: Experimental and Measurement Proceduresmentioning

confidence: 99%