Cowan, P. L.Golovchenko, JeneRobbins, M. F.2016-11-181980Cowan, P. L., J. A. Golovchenko, and M. F. Robbins. 1980. X-Ray Standing Waves at Crystal Surfaces. Physical Review Letters 44, no. 25: 1680-1683. doi:10.1103/physrevlett.44.1680.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:29407057With use of bromine atoms, deposited on the surface of a silicon single crystal, the presence of x-ray standing waves above the crystal surface has been detected under conditions of strong Bragg diffraction.en-USJournal Article2016-11-1810.1103/PhysRevLett.44.1680