The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy. Atoms moving toward the light source encounter higher-frequency radiation than atoms moving away from the source. The difference in wavelength A experienced by an atom moving at speed v (compared to one at rest) is A/ho=v/c, where c is the velocity of light. Estimate the line width (in nanometers) of the lithium line at 670.776 (6707.76 A) when the absorbing atoms are at a velocity v is: (a) 2.47 x 10³ m/s (when T= 2000 K). (b) 3.08 x 10³ m/s (when T=3120 K). (Boltzmann's constant k = 1.38 x 10-23 kg m² s² K-¹) Yo
The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy. Atoms moving toward the light source encounter higher-frequency radiation than atoms moving away from the source. The difference in wavelength A experienced by an atom moving at speed v (compared to one at rest) is A/ho=v/c, where c is the velocity of light. Estimate the line width (in nanometers) of the lithium line at 670.776 (6707.76 A) when the absorbing atoms are at a velocity v is: (a) 2.47 x 10³ m/s (when T= 2000 K). (b) 3.08 x 10³ m/s (when T=3120 K). (Boltzmann's constant k = 1.38 x 10-23 kg m² s² K-¹) Yo
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter8: An Introduction To Optical Atomic Spectrometry
Section: Chapter Questions
Problem 8.8QAP: The Doppler effect is one of the sources of the line broadening in atomic absorption spectroscopy....
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