THE 1s-2s EXCITATION OF HYDROGEN ATOMS BY PROTON IMPACT
It is shown that the cross sections for excitations of hydrogen by proton impact. given by the customary second Born approximation, are not reliable because of the neglect of a large term of the fourth order in the interaction energy. The expression for the cross section obtained by including only terms to the third order in the interaction energy was employed to calculate the cross sections for the proton impact excitation of the 2s state of atomic hydrogen. Allowance was made for distortion and polarization due to the 1s, 2s, and 2p/sub 0, plus or minus 1/ intermediate states. When polarization was ignored by neglecting all terms involving the 2p states, excellent agreement was found with the distortion approximation calculation of sates. (auth)
- Research Organization:
- Queen's Univ., Belfast
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-002004
- OSTI ID:
- 4135984
- Journal Information:
- Proc. Roy. Soc. (London), Journal Name: Proc. Roy. Soc. (London) Vol. Vol: A258
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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