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Report No.

Symmetric charge transfer cross section of ytterbium, lutetium and samarium

Shibata, Takemasa; Tamura, Koji; Ogura, Koichi

Cross sections of symmetric charge transfer are calculated for ytterbium, lutetium and samarium. Symmetric charge transfer of lanthanoide elements in most cases has two main reaction paths, that is, resonant and non-resonant paths due to open 4f shells inside 6s electrons. At low impact energy, charge transfer cross sections are small because only resonant path is possible. On the other hand, the charge transfer of ytterbium, lutetium and samarium has only resonant path. Therefore the charge transfer cross sections of these atoms decrease monotonically with the impact energy. The cross sections of ytterbium and samarium are 203 $AA $^{2}$$ and 224 $AA $^{2}$$ at the impact energy of 1 eV/amu, respectively. These values are larger than the cross sections of many lantanoid elements such as dysprosium. The cross section of lutetium is 65 $AA $^{2}$$ at the impact energy of 1 eV/amu. This value is small due to d-electron transfer.



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