Abstract
By means of exact calculations, the complete recoil spectrum of a suddenly-perturbed N-electron Fermi sea is evaluated. Its threshold shape is compared with the theory of Nozieres and de Dominicis (1969) and Doniach and Sunjic (1970) which is believed to be asymptotically valid for small excitation energies and N to infinity . For N approximately=10, the N= infinity threshold behaviour is apparent. However, the distance from threshold over which the asymptotic threshold shape remains universally valid for all final-state interactions is limited to a small percentage of the Fermi energy. The present work provides a simple method for computing complete X-ray photoemission spectral (XPS) lineshapes for independent-electron metals. It also offers potential explanations of: (i) the incompatibilities between XPS threshold exponents and exponents extracted from other data; (ii) the occurrence of nearly-symmetric XPS lines; and (iii) the lack of mirror symmetry of absorption and emission edges.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
