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Characterization Techniques
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Message Icon Topic: Calculation of Molar extinction coefficient in gel(Topic Closed Topic Closed) Post Reply Post New Topic
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Ginj
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bullet Topic: Calculation of Molar extinction coefficient in gel
    Posted: 21 September 2000 at 8:59am

Please let me know how we can calculate the Molar extinction coefficient of gel matrices containing rare earth ions from its absorption spectrum. I have to use this for oscillator strength calculation.

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M.Prassas
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bullet Posted: 02 October 2000 at 4:11am

One easy way to calculate OS is using the following formula:

f= (2.3*m*c²/pi*e²*N*lamba²*l)Integrale(DO(lamda)dlamda or f=2.6E21 * ( 1/ N*l*lamda²)*Integral(DO(lamda) dlamda were : N is the number of ions per cc of solid matter Lamda is the mean wavelength of the transition and l is the length of the measured sample (you have to correct that by the porosity of your gel in order to get the right number) The integral (Integ DO(lamda)dlamda) can be easily estimated by taking the area under the absorption peak under question (background corrected)

See also :J.of Appl. Phys. 79 (12), 1996 p8906
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