By Topic

Measurements of the HF vibration-vibration transfer time and apparent vibration decay rate of v = 2 using observation of the v = 2 v = 1 fluorescence in HF

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Osgood, R. ; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA ; Javan, A. ; Sackett, P.

An experiment resulting in measurement of vibration to vibration transfer rate in pure HF is described. The technique involves pumping a sample cell containing pure HF with an HF chemical laser oscillating on a \upsilon = 1 \rightarrow \upsilon = 1 transition, and then using a filter cell monoehromator combination to separate the \upsilon = 2 \rightarrow \upsilon = 1 fluorescence from that of \upsilon = 1 \rightarrow \upsilon = 0 . An analytic model yielding the time resolved \upsilon = 2 \upsilon = 1 fluorescence is also developed. This model indicates that the rise time of the observed \upsilon = 2 \rightarrow \upsilon = 1 fluorescence gives a direct measurement of the vibration-vibration transfer rate, out of \upsilon = 2 ; that is, the process HF( \upsilon = 2 ) + HF (\upsilon = 0) \rightarrow 2 HF( \upsilon = 1 ). In addition it shows that the population of \upsilon = 2 is proportional to its rate of production and hence to the population in the \upsilon = 1 state squared. As a result the apparent decay rate of our observed \upsilon = 2 fluorescence is twice that for \upsilon = 1 . We find good agreement between these predictions and the results of the time resolved fluorescence experiments. The implication of these results to previous measurements of HF V-T (or V-R) relaxation rate is discussed briefly.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:9 ,  Issue: 1 )