Biswas, P. K.Adhikari, S. K.2014-05-202014-05-202000-01-28Chemical Physics Letters. Amsterdam: Elsevier B.V., v. 317, n. 1-2, p. 129-134, 2000.0009-2614http://hdl.handle.net/11449/22996The low-energy scattering of the ortho-positronium (Ps) by H, He, Ne, and Ar atoms has been investigated in the coupled-channel framework by using a recently proposed time-reversal symmetric non-local electron-exchange model potential with a single parameter C. For H and He, we use a three-Ps-state coupled-channel model and, for Ar and Ne, we use a static-exchange model. The sensitivity of the results is studied with respect to the parameter C. Present low-energy cross-sections for He, Ne and Ar are in good agreement with experiment. (C) 2000 Elsevier B.V. B.V. All rights reserved.129-134engArtigo10.1016/S0009-2614(99)01354-8WOS:000085128300022Acesso restrito8031087349809439