BremsLib v2.0
Description
BremsLib v2.0 is a library of double- and single differential cross sections of electron-atom bremsstrahlung. It is a major update of BremsLib v1.0.5, which was published in 2019. BremsLib v2.0 contains the data for 86300 combinations of three physical parameters: atomic number Z, incident electron energy T1, and bremsstrahlung photon energy k. All values of Z from 1 to 100 are represented. The range of variation of T1 is from 10 eV to 30 MeV for non-zero k, or from 10 eV to 100 MeV for k = 0. The range of variation of k / T1 is from 0 to 0.9999. The library data were calculated by the relativistic partial-wave method. The target atom is described by Kohn-Sham interaction potential. Radial dependence of positive charge density inside the nucleus is modeled by the Fermi distribution. In comparison with BremsLib v1.0.5, the high-energy endpoint of the incident electron energy range has been increased from 3 MeV to 30 MeV, all the previously-published data have been recalculated, and an additional grid value of the radiated photon energy (equal to 97.5 % of the incident electron energy) has been inserted at all values of the incident electron energy. Although the changes in the values of the previously-published cross sections are insignificant, their uncertainties have been made more reliable. In the soft-photon limit, those uncertainties have been in some cases reduced by several orders of magnitude because of a more efficient calculation method based on the Low theorem, which has been applied in the case of zero photon energy at all values of the incident electron energy up to 100 MeV. The distribution package of BremsLib v2.0 is in a .ZIP file, which contains three folders: (a) main library data folder "BremsLib_v2.0" with the complete set of values of scaled double- and single-differential cross sections of bremsstrahlung corresponding to 86300 combinations of the physical parameters Z, T1 and k / T1, (b) folder "Interpolate_DCS" with the code and documentation of the program "Interpolate_DCS", which can be used for data retrieval and interpolation, (c) folder "Brems" with the code and documentation of the program BREMS (v1.5.8.8), which was used for generation of the library data at non-zero k.