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seen Jul 12 at 17:39

Jul
2
comment How are determined experimentally the energy levels of the atoms ? How is the calibration done to several decimal points?
Thank you. I get that a spectrometer could have high resolution. But I guess I am trying to understand how is absolute energy associated with particular absorption line ? Why is some edge at 284 not 280eV and why different people think some edges (absorption lines) are at slightly different energies ?
Jul
1
revised How are determined experimentally the energy levels of the atoms ? How is the calibration done to several decimal points?
added 78 characters in body
Jul
1
asked How are determined experimentally the energy levels of the atoms ? How is the calibration done to several decimal points?
Apr
28
awarded  Popular Question
Apr
22
accepted What is the reason that EXAFS are done with monochromatic x-ray light?
Apr
21
comment What is the reason that EXAFS are done with monochromatic x-ray light?
Thanks. My question is which process in the exafs fails if the beam is not monochromatic. Where is the TEY (total electron yield) used, is it in analysis. Arent photons that are collected?
Apr
21
revised What is the reason that EXAFS are done with monochromatic x-ray light?
added 14 characters in body
Apr
21
comment Resolving power of a diffraction grating?
This is the condition for multiple N slit principle max nλ=dsin(θ). The min occur at sλ=Ndsin(θ) s = +/-1,2, when s/N is integer it is principle max. There are N-2 max between each principal max and N-1 min. As the N is increased the width of the principle max decreases so the spectral resolution increase.
Apr
21
revised What is the reason that EXAFS are done with monochromatic x-ray light?
added 28 characters in body
Apr
21
asked What is the reason that EXAFS are done with monochromatic x-ray light?
Apr
21
comment Does the EXAFS oscillations occur when ultrashort x-ray pulse is used? Electron with a 50eV kinetic energy will travel in 0.1fs 4.2 Angstroms
Thank you. I guess that my next question is the spectrum of the x-ray required to be monochromatic. I basically dont understand the electron wave interference picture and the nature of the EXAFS oscillation and ask what if blindly. What I am trying to understand is does the electron has to return to the absorbing atom, to modify the absorption, and what if the auger decay happens before the electron returns. Is timing anyhow limiting anything.
Apr
20
revised Does the EXAFS oscillations occur when ultrashort x-ray pulse is used? Electron with a 50eV kinetic energy will travel in 0.1fs 4.2 Angstroms
added 97 characters in body
Apr
20
revised Does the EXAFS oscillations occur when ultrashort x-ray pulse is used? Electron with a 50eV kinetic energy will travel in 0.1fs 4.2 Angstroms
edited title
Apr
20
revised Does the EXAFS oscillations occur when ultrashort x-ray pulse is used? Electron with a 50eV kinetic energy will travel in 0.1fs 4.2 Angstroms
added 28 characters in body
Apr
20
asked Does the EXAFS oscillations occur when ultrashort x-ray pulse is used? Electron with a 50eV kinetic energy will travel in 0.1fs 4.2 Angstroms
Apr
20
accepted Does chirp (GDD, TOD ) affect the temporal coherence of a laser?
Mar
14
accepted What is a virtual photon pair?
Mar
14
accepted EXAFS (Extended X-Ray Absorption Fine Structure) question?
Mar
9
revised Does chirp (GDD, TOD ) affect the temporal coherence of a laser?
added 8 characters in body
Mar
9
revised Does chirp (GDD, TOD ) affect the temporal coherence of a laser?
added 189 characters in body