کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7839272 | 1505704 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Elastic scattering and rotational excitation of Li2 by positron impact
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report an ab initio and model potential investigation of elastic and rotational excitation cross sections for positron impact with Li2 molecule in the energy range from 0.1 to 10.0â¯eV. The ab initio cross sections were calculated with the Schwinger Multichannel Method, while the model potential calculations were performed with the Method of Continued Fractions, applying the correlation-polarization interaction known as PCOP. The converged elastic cross sections suggest a spherical polarizability for Li2 between 150 and 160â¯a03, a value considerably lower than the experimental one (â216â¯a03). Rotational excitation cross sections obtained corroborate previous results available, with some discrepancy for the quadrupolar transition for energies below 3â¯eV. Our results indicate that such divergence comes from the consideration of a correlation-potential properly designed to treat positron-molecule scattering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 227, August 2018, Pages 9-14
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 227, August 2018, Pages 9-14
نویسندگان
Eliton P. Seidel, Marcos V. Barp, Wagner Tenfen, Felipe Arretche,