کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1686345 1010594 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polarisation effects in low-energy positron–molecule scattering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Polarisation effects in low-energy positron–molecule scattering
چکیده انگلیسی

The UK molecular R-matrix method has been adapted to treat positron collisions from polyatomic targets. A simple empirical enhancement factor which corrects for the underestimation of electron–positron polarisation and correlation effects in the calculations performed with the static-plus-polarization model at low scattering energies is presented. Application of this model to positron scattering from carbon dioxide at energies below 8 eV is discussed. Introduction of the enhancement factor improves the integral cross sections significantly and introduces structures in the differential cross sections consistent with other studies. The prospects for a fully ab initio treatment of this problem are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 266, Issue 3, February 2008, Pages 419–424
نویسندگان
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