The differential cross sections for excitation of the n=2 state of atomic hydrogen by the impact of electrons with energies of 54, 100, 136, and 200 eV are calculated in the distorted-wave approximation with exchange included. Cross sections for excitation of the 2s1/2, 2p1/2, and 2p3/2 states are calculated and summed to give the n=2 differential cross sections. The results of this calculation are compared with previous theoretical calculations and with recent absolute experimental data.
R. V. Calhoun et al., "Excitation of the n=2 State of Atomic Hydrogen by Electron Impact in the Distorted-Wave Approximation," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 14, no. 4, pp. 1380-1387, American Physical Society (APS), Oct 1976.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevA.14.1380
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© 1976 American Physical Society (APS), All rights reserved.