Science Advances

Supplementary Materials

This PDF file includes:

  • Source and helium beam.
  • Slits, apparatus geometry, and definition of angles.
  • Mass spectrometer detector and apparatus resolution.
  • Derivation of the “rule of thumb” of quantum reflection.
  • Fig. S1. Schematic of the quantum-reflection diffraction setup.
  • References (32, 33)

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