Angular differential cross sections for the process H+ + H(1s ) → H+ (θ ) + H ( n = 2 ) are presented for 25-, 50-, and 100-keV protons incident on atomic hydrogen. The experimental results are in fair agreement with Glauber-approximation calculations.
J. T. Park et al., "Angular Differential Cross Sections for Excitation of Atomic Hydrogen by 25-, 50-, and 100-keV Protons," Physical Review Letters, vol. 40, no. 25, pp. 1646-1648, American Physical Society (APS), Jun 1978.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevLett.40.1646
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