Electron and positron impact excitation of hydrogen from the initially excited 22S state to 32S and 32P states |
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Authors: | Surbhi Verma Rajesh Srivastava |
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Institution: | (1) Department of Physics, University of Roorkee, 247 667 Roorkee, India |
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Abstract: | The total and differential cross sections for the electron and positron impact excitation of hydrogen from its initially excited metastable 22S state to 32S and 32P states are reported. A distorted-wave approximation theory is used for the calculation. The angular correlation parameters, Ly and alignment angle are also reported for 22S-32P excitation. For comparison, similar first Born results are also obtained. Interesting features are noted on comparing our distorted wave results with the first Born results as well as with the other available results forn
2S andn
2P (n=2,3) excitations from the ground 12S state of hydrogen. |
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