H." Sato

I. "Murakami

J. Yan

M. Kimura

R.K. Janev

T. Kato

National Institute for Fusion Science (NIFS-Repository)

§5. Cross Section Database for Li3+ Colliding with H Atoms Murakami, 1., Kato, T., Janev, R.K. (MASA, Skopje), Yan, J. (IAMep, Beijing), Kimura, M. (Yamaguchi Univ., Ube), Sato, H. (Ochanomizu Women Univ., Tokyo) U sing the available experimental and theoretical data, as well as well established scaling relationships, a cross section database for excitation, ionization and electron capture processes in collisions of Li3+ ions with hydrogen atoms in their ground and excited states has been generated. The experimental and theoretical data were critically assessed for their accuracy and a "preferred" ("recommended") cross section was derived on that basis for each considered reaction. So derived recommended cross sections were then fitted to appropriate analytic fitting expressions that have correct physical behavior at both low- (or threshold) and high-energy regions. The uncertainties of provided cross sections were estimated for different energy regions. For the excitation processes Li3+ + H(no::O:l) --> Li3+ + H(n>no) only theoretical data were found in the literature for the transitions no= I --> n=2,3,4. The cross sections for other transitions were determined by using scaling procedures. F or the ionization processes a significant number of both experimental and theoretical data are available, but only for the n= I s ground state of H. The ionization cross sections for the excited hydrogen states were determined by fairly well established scaling 410 relations. For the electron capture process experimental data were found only for the total cross section (summed over n!) for capture from the ground no= 1 s state. Several highly accurate theoretical calculations exist for the state-selective electron capture from H(l s) to specific nl states of Li2+ ion. Such calculations are, however, very sparse for no> I states. While a scaling relation does exist for the total electron capture cross section for no> I, for the state-selective nl- cross sections such relations are not available at present. A NIFS-DATA report is now being in preparation with the generated database. 

Cross Section Database for Li3+ Colliding with H Atoms

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