Virtually all diffraction data are reported as a function of the scattering angle 2Theta. Some authors kindly report in the plot also the wavelength of the source, which allow the reader to calculate the scattering vector and the spacing accordingly. In most cases however, one has to search the manuscript to identify the wavelength at which the experiment was conducted.
I was now wondering, if there is any reason not to report the data as a function of the scattering vector. Is it only for historical reasons, two theta still persists, or has it some advantages I am missing at the moment?
Best wishes,
Leonardo
Dear Leonardo,
it is to my opinion just a matter of measurement via changing the theta and 2theta value in the experimental set up. Theta/2theta is primarily the measurement variable.
But you are right, display should be done in q scale; so all conversions with respect to different applied wave lengths will be obsolete.
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