written by
Asma Khalid,
Aleena Tasneem Khan, and
Muhammad Sabieh Anwar
published by
the LUMS School of Science and Engineering
In this experiment students use XRF spectroscopy to analyze a sample's elemental composition. From the characteristic X-ray energies, Moseley's Law, a proof of the existence of the atomic number, is verified. The atomic number increases in regular steps with an increase in the characteristic X-ray energy. We will use this relationship to find the Rydberg's energy constant and screening coefficient for K X-rays.
This lab is designed for the student to learn to:
1. differentiate between characteristic X-rays and Bremsstrahlung radiations, 2. use characteristic X-rays to identify elements, 3. acquire a spectrum, calibrate it and use it for qualitative (element identification) as well as quantitative (elemental concentration) analysis, and finally, 4. verify Moseley's law and the validity of an atomic number.
<a href="http://www.compadre.org/advlabs/items/detail.cfm?ID=11727">Khalid, A, A. Khan, and M. Anwar. X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number". Lahore Cantt: LUMS School of Science and Engineering, Pakistan, July 23, 2011.</a>
A. Khalid, A. Khan, and M. Anwar, X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number" (LUMS School of Science and Engineering, Pakistan, Lahore Cantt, 2011), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11727&DocID=2608).
A. Khalid, A. Khan, and M. Anwar, X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number" (LUMS School of Science and Engineering, Pakistan, Lahore Cantt, 2011), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11727&DocID=2608>.
Khalid, A., Khan, A., & Anwar, M. (2011, July 23). X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number". Retrieved May 25, 2013, from LUMS School of Science and Engineering, Pakistan: http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11727&DocID=2608
Khalid, A, A. Khan, and M. Anwar. X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number". Lahore Cantt: LUMS School of Science and Engineering, Pakistan, July 23, 2011. http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11727&DocID=2608 (accessed 25 May 2013).
Khalid, Asma, Aleena Tasneem Khan, and Muhammad Sabieh Anwar. X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number". Lahore Cantt: LUMS School of Science and Engineering, Pakistan, 2011. 23 July 2011. 25 May 2013 <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11727&DocID=2608>.
@misc{
Author = "Asma Khalid and Aleena Tasneem Khan and Muhammad Sabieh Anwar",
Title = {X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number"},
Publisher = {LUMS School of Science and Engineering, Pakistan},
Volume = {2013},
Number = {25 May 2013},
Month = {July 23, 2011},
Year = {2011}
}
%0 Electronic Source %A Khalid, Asma %A Khan, Aleena Tasneem %A Anwar, Muhammad Sabieh %D July 23, 2011 %T X-Ray Fluorescence (XRF) spectrometry for materials analysis and discovering "the atomic number" %I LUMS School of Science and Engineering, Pakistan %V 2013 %N 25 May 2013 %8 July 23, 2011 %9 application/pdf %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11727&DocID=2608
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