Data and octave codes for: Derivation of an Improved Semi-empirical Expression for the Re-ionisation Background in Low Energy Ion Scattering Spectradoi:10.26165/JUELICH-DATA/2GRSPNJülich DATA2021-09-021Koslowski, Hans Rudolf, 2021, "Data and octave codes for: Derivation of an Improved Semi-empirical Expression for the Re-ionisation Background in Low Energy Ion Scattering Spectra", https://doi.org/10.26165/JUELICH-DATA/2GRSPN, Jülich DATA, V1Data and octave codes for: Derivation of an Improved Semi-empirical Expression for the Re-ionisation Background in Low Energy Ion Scattering Spectradoi:10.26165/JUELICH-DATA/2GRSPNKoslowski, Hans RudolfGNU octaveJülich DATAKoslowski, Hans RudolfKoslowski, Hans Rudolf2021-08-30PhysicsThis repository provides the raw data, the fitting results, and the GNU octave codes used for the low energy ion scattering spectra fits (figures 1, 7 and 8) in the publication H. R. Koslowski and Ch. Linsmeier 2021 "Derivation of an Improved Semi-empirical Expression for the Re-ionisation Background in Low Energy Ion Scattering Spectra" IOP SciNotes 2 035206 https://doi.org/10.1088/2633-1357/ac25e8.10.1088/2633-1357/ac25e8H R Koslowski and Ch Linsmeier 2021 IOP SciNotes 2 03520620190319_1659_He_WCrY_1000_140_20_5000.datLEIS experimental spectrum data; ASCII, two columns: E (energy, eV) and N (counts)chemical/x-mopac-input20190319_1659_He_WCrY_1000_140_20_5000.fitfitted spectrum; file contains experimental data, individual peaks and backgrounds, and sum of all contributions; ASCII, multiple columns, first row are column headersapplication/x-fityk20190319_1659_He_WCrY_1000_140_20_5000.matsaved octave session; ASCII, file can be loaded from LEISfit.mapplication/matlab-mat20201211_1656_He_W_1000_140_20_10000.datLEIS experimental spectrum data; ASCII, two columns: E (energy, eV) and N (counts)chemical/x-mopac-input20201211_1656_He_W_1000_140_20_10000.fitfitted spectrum; file contains experimental data, individual peaks and backgrounds, and sum of all contributions; ASCII, multiple columns, first row are column headersapplication/x-fityk20201211_1656_He_W_1000_140_20_10000.matsaved octave session; ASCII, file can be loaded from LEISfit.mapplication/matlab-matfbglogistic.moctave function; re-ionisation background using logistic functiontext/x-objcsrcfgauss.moctave function; Gaussian profiletext/x-objcsrcfleis.moctave function; parametrized LEIS spectrum, up to five Gaussians plus re-ionisation background(s) and sloped offsettext/x-objcsrcLEISfit.moctave program; LEIS spectrum fittext/x-objcsrcreadleis.moctave function; reading of LEIS datafile, ASCII, two columns: E (energy) and N (counts)text/x-objcsrcreadvar.moctave function; interactive reading of a variabletext/x-objcsrc