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Single ionization of the [Formula Presented] and [Formula Presented] states of He by 1-GeV/u [Formula Presented] ions

par Selin, A.V. A.V.;Ermolaev, Alexei ;Joachain, Charles
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 67, 1, page (5)
Publication Publié, 2003

Article révisé par les pairs

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Résumé :

We report calculations of the cross sections for single ionization of the ground [Formula Presented] and excited [Formula Presented] helium states by relativistic impact of a bare uranium ion of charge [Formula Presented] with energy 1 GeV/u. The heavy particle collision is treated within the semirelativistic first Born approximation. The nonrelativistic initial and final two-electron correlated atomic states are obtained by numerical procedures from variational principles. The continuum final states are considered below the [Formula Presented] threshold of the [Formula Presented] ion. The differential ionization cross section [Formula Presented] is obtained for electron energies [Formula Presented] This energy range includes a wide nonresonant region as well as the resonance structures due to the autoionizing helium states [Formula Presented] [Formula Presented] and [Formula Presented]. © 2003 The American Physical Society.