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Ro-vibrational close coupling study of positron–hydrogen molecule scattering using the parameter-free model correlation polarization potential

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Abstract:

In this paper, we have presented the ro-vibrational laboratory frame close coupling (LFCC) calculation for the positron–hydrogen molecule scattering process. We have reported here (integrated) total cross section as well as vibrational and rotational excitation cross sections in the low-energy region of the incident positron. To calculate the scattering parameters we have used the positron correlation polarization potential (PCOP), which is especially meant for the positron as the incident particle. The present results are compared with the existing elaborate theories and the measured values. The present total cross sections agree well with the measured values, whereas the absolute values of the 0 → 1 vibrational excitation cross sections differ marginally. There are some differences between the present result and the other theoretical predictions. The reasons behind the differences are discussed.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-4075/41/12/125201

Publication date: June 28, 2008

iop/jphysb/2008/00000041/00000012/art125201
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