Disclaimer

No responsibility for the use of SigmaCalc in any purpose is assumed. Author's intention is to present only the most accurate cross sections. However, so far as the cross sections are given by nature no way to know genuine values of these data exists. Author did his best to elaborate the most reliable data combining experimental and theoretical results into a coherent whole. It is possible that further experiments undertaken at a higher level of experimental accuracy give rise to the revision of the present data.