https://www.nist.gov/publications/lattice-position-si-gaas-determined-x-ray-standing-wave-measurements
Lattice Position of Si in GaAs Determined by X-Ray Standing Wave Measurements | NIST
x ray standing wave
https://www.osti.gov/pages/biblio/2481083-atomic-site-specific-surface-valence-band-structure-from-ray-standing-wave-excited-photoemission
Atomic-Site-Specific Surface Valence-Band Structure from X-Ray Standing-Wave Excited Photoemission...
The U.S. Department of Energy's Office of Scientific and Technical Information
x ray standing wave