FIZIKA A 10 (2001) 2 , 61-72

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R. DAS, S. SAHOOa and K. ROYb

   a Institute of Material Science, Univ. of Tsukuba, Ibaraki 305-8573, JAPAN

bDepartment of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Calcutta 700 032, INDIA

Received 12 December 2000; revised manuscript received 22 June 2001
Accepted 5 September 2001

Ionization of mono-electron and multi-electron target atoms has been studied at different impact energies ranging from 5 to 1000 keV using Born approximation. Total cross-sections for the ionization of H, He and Ne in collision with atomic projectiles such as H and He are reported. For the bound state wave functions of He and Ne, simplifications are made by assuming that the atom has single active electron and is influenced by an effective potential due to the passive electrons and the residual core. We represent the bound state wave functions by Slater type orbitals obtained from the model potential. In the final channel, we consider the continuum state wave function is centered around the ionized site of the target atom. The results thus obtained are compared with other theoretical predictions as well as with experimental data. On comparing, reasonably good agreements have been found in the intermediate and high energy region.

PACS numbers: 34.10.+x, 34.90.+q
UDC 537.563.3
Keywords: Ionization, bound state wave function, continuum state wave function, multi-electron target atoms, Slater type orbitals, model potential
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