Electron emission 12 Electron emission spectra Emission spectroscopy 12 Band structure 6 Electronic band structure 6 Photo-electron emission 6 Condensed matter physics 4 Crystal orientation 4 Crystal surfaces 4 Double differential 4 Electric fields 4 Electromagnetic pulse 4 Electrons 4 Emission distribution 4 Emission spectrums 4 External fields 4 Perturbative method 4 Projectile charge 4 Projectiles 4 Ultrashort electromagnetic pulse 4 Vector potential 4 Angle-resolved 2 Band structure effects 2 Combined effect 2 Distorted wave methods 2 Distorted waves 2 Electromagnetism 2 Electron surface 2 Electronic states 2 Emission probabilities 2