![]() ![]() I have inserted the second paragraph in this edit and the example. That is, the mathematical equations that might describe the data (specifically around a peak). Thanks!ĮDIT: To clarify, I am interested in line shapes, not the locations of the lines. For x-ray characterization, we used a Bruker. It might also include images with the function displayed with various combinations of parameters - to make it easier to recognize.ĭoes such a tool or reference exist? If so, please let me know! If not, I would be curious to hear about any comparable substitute. 8 software, which allows qualitative and semi-quantitative analysis of the spectral bands (Wojdyr and Fityk, 2010). It specializes in fitting a sum of bell-shaped functions to experimental data. Ideally, this lineshape reference would include a list of circumstances where the lineshape typically arises. Fityk is portable, open-source software for nonlinear curve fitting and data analysis. It would be great to have a curve-fitter that can try fitting to several different common functions, or even to have a table to check by eye and see if my lineshape is a good fit to some well-known function. Creating citations in Chicago style has never been easier thanks to our extensive Citation Machine® Chicago style guide and tools. For example, suppose I am expecting a narrow gaussian peak, but my experiment's resolution is limited by some component with a lorentzian peak (or vice verse) a fit to the wrong function might produce bad results. Or say that some unexpected part of my experiment is substantially impacting the lineshape. But say I have less than perfect knowledge of the theory around the data I am fitting. If I know what the data should look like, then I can fit the data to a formula. You can find lots of lineshapes described all over the internet and various other resources, but they are some that you will not find unless you already kind of know what you are looking for. Is there an index of common spectral lineshapes in physics? Is there a program that automatically tries fitting to many different lineshapes?īy line shape I mean the function that, given appropriate parameters, describes the dataset around a peak. Answers containing only a reference to a book or paper will be removed! Explain the nature of the resource so that readers can decide which one is best suited for them rather than relying on the opinions of others. Please write substantial answers that detail the style, content, and prerequisites of the book, paper or other resource. ![]() The smooth background was removed using the background subtraction tool. Before answering, please see our policy on resource recommendation questions. This function was implemented as a user-defined function in the Fityk program (44).
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