Scattering of hydrogen atoms at low temperatureA. Sen, S. Chakraborty and A. S. Ghosh
Department of Theoretical Physics, Indian Association for the Cultivation of Science Jadavpur, Kolkata-700 032, India
received 9 August 2006; accepted in final form 26 September 2006
published online 18 October 2006
A non-adiabatic model is employed to investigate the H-H scattering at low temperatures. Unlike molecular-orbital calculation technique, no separate calculations are required to obtain the potential energies of electrons in the field of hadrons. This model generates the non-adiabatic effective potential automatically. The coefficients of van der Waals and higher-order potentials are estimated in the present model and are found to be in very good agreement with the corresponding standard values. The s-wave singlet and triplet scattering lengths and thermal-average total triplet cross-section at 2 are reported and compared with the existing theoretical and experimental predictions.
34.50.-s - Scattering of atoms and molecules.
31.15.Ar - Ab initio calculations.
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