Physical Review · 1933 · 13 citations · 2 references
Natural SciencesChemistryAtmospheric ChemistryAtmospheric ScienceSpectroscopyAbsorption SpectroscopyAtmospheric AbsorptionAbsorption Line BroadeningAbsorption SpectrumDensityMolecular Absorption LinesPressure EffectsPressure ShiftsResonanceResonance Lines
Pressure effects on the first three doublets of the principal series of the potassium absorption spectrum have been produced by nitrogen up to 30 atmospheres pressure. The 4045A and 3446A pairs show shifts of the absorption maxima to the red and half-widths more than twice as large as those for the resonance lines. In the range of nitrogen pressures above "relative density" 10 both the shifts and the half-widths increase more rapidly than linearly with density. The $^{2}P_{\frac{1}{2}}$ components exhibit this departure from the linear relation more markedly than the $^{2}P_{1\frac{1}{2}}$ components. Possible explanations of these variations are suggested. Quantitative results are summarized in the figures and tables.
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Pressure Shift and Broadening of Spectral Lines
Henry Margenau · Physical Review · 1932 · 76 citations