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Application of the second born approximation to excitation of hydrogen atoms by protons and antiprotons impact
Faculty
Science
Year:
2008
Type of Publication:
Article
Pages:
3635-3638
Authors:
Said, Samia M, Tantawi, Reda S
DOI:
10.1088/0256-307X/25/10/031
Journal:
CHINESE PHYSICS LETTERS IOP PUBLISHING LTD
Volume:
25
Research Area:
Physics
ISSN
ISI:000259736600031
Keywords :
Application , , second born approximation , excitation , hydrogen
Abstract:
We present and compare total cross sections for excitation in collisions of protons and antiprotons with hydrogen atoms in the 28 state. Calculations are performed in the framework of the second Born approximation, in the energy range of 5-1000keV. We apply the usual approach of the second Born approximation, which approximates the summation raised by retaining few terms, as well as another approach approximates all energies corresponding to the intermediate states to that corresponding to the initial state. The annihilation effect in the case of the antiproton collision is investigated. We compare the results with the previous theoretical calculations.
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