Inner shell excitation of glycine, glycyl-glycine, alanine and phenylalanine

Oscillator strengths for C 1s excitation spectra of gaseous glycine (Gly), alanine (Ala), phenylalanine (Phe) and glycyl-glycine (Gly-Gly), plus the N 1s and O 1s spectra of Gly and Gly-Gly, have been derived from inner shell electron energy-loss spectroscopy recorded under scattering conditions where electric dipole transitions dominate (2.5keV residual energy, θ:∼2°). X-ray absorption spectra of solid glycine and glycyl-glycine were recorded …