Abstract: Methods for separating isotopes are provided. An embodiment of such a method comprises directing a supersonic beam characterized by an average velocity v and velocity distribution ?v/v, the beam comprising a first isotope and a second isotope, at a single-crystalline surface at an angle of incidence ?i such that the first isotope elastically scatters from the surface with a peak angle ?f1 and the second isotope elastically scatters from the surface with a peak angle ?f2; and selectively collecting the scattered first isotope, the scattered second isotope, or both. Apparatus for carrying out the methods are also provided.

Abstract: Methods for separating isotopes are provided. An embodiment of such a method comprises directing a supersonic beam characterized by an average velocity v and velocity distribution ?v/v, the beam comprising a first isotope and a second isotope, at a single-crystalline surface at an angle of incidence ?i such that the first isotope elastically scatters from the surface with a peak angle ?fl and the second isotope elastically scatters from the surface with a peak angle ?f2; and selectively collecting the scattered first isotope, the scattered second isotope, or both. Apparatus for carrying out the methods are also provided.