FIZIKA A 5 (1996) 1, 21-30

EXCITATION OF THE HYDROGEN ATOM FROM THE METASTABLE 2s-STATE BY ELECTRON IMPACT

LALAN K. JHA¹, BISHWA N. ROY¹ and PRADIP K. BISWAS^2
1Department of Physics, B. R. A. Bihar University, Muzaffarpur-842001, Bihar, India
²Department of Theoretical Physics, I. A. C. S. Jadavpur, Calcutta-700032, India

Received 10 January 1996

Excitation of hydrogen atom from its metastable 2s-state to ns (n = 3,4,5,6) and np (n = 3) states by electron impact has been investigated by employing a distorted-wave method, in the framework of the two-potential formulation. Contribution of exchange has been included by antisymmetrising the total wave function of the system. The differential cross-sections are reported at intermediate energies. Theoretical findings for 2s-5s and 2s-6s transitions have not been reported earlier.

UDC 539.184
PACS 34.80.Dp

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