The problem is I do not find any information on the Serach method of TSpectrum in the ROOT User Guide. Does it refer to another manual?
So could you clarify that point in the web documentation or add a section in the ROOT User Guide. Quickly, I hust wanted to know what is the “unit” of sigma. I understand that a big sigma corresponds to wide peaks and a small one to narrow peaks. But what does “big” and “small” means? What is the unit of “sigma” (bin, value, …)?
Thanks in advance.
I have translated the Spectrum Word document into markown. This allows to have this manual in the ROOT related user’s guides page: https://root.cern.ch/root-user-guides-and-manuals
Note that this manual is now available in:
Dear Couet,
So, what is sigma?
Is it possible to give this information in this topic, because I see many links and new link inside them and such links do not work or without this information.
This documentation is delivered “as it is” . The author of this code and documentation is not available anymore. I am afraid you we cannot give you more details than what is written in this doc or what you can read in the code itself.
M.A. Mariscotti: A method for identification of peaks in the presence of background and its application to spectrum analysis. NIM 50 (1967), 309-320.
M. Morhac;, J. Kliman, V. Matouoek, M. Veselsky, I. Turzo.:Identification of peaks in multidimensional coincidence gamma-ray spectra. NIM, A443 (2000) 108-125.
Z.K. Silagadze, A new algorithm for automatic photopeak searches. NIM A 376 (1996), 451.
?
Do you have the first article in free access on root cern web cite ?
…The value in the center of the peak value[i] minus the average value in two symmetrically positioned channels (channels i-3*sigma, i+3*sigma) must be greater than threshold. Otherwise the peak is ignored…