تشکیل پوزیترونیوم در ربایش الکترون از مولکول متان محاسبه سطح مقطع پراکندگی جزیی وکل ازدامنه‌های پراکندگی مرتبه اول الکترونی و بین هسته‌ای

نوع مقاله: مقاله پژوهشی کامل

نویسنده

هیئت علمی/دانشگاه شهید باهنر کرمان، دانشکده فیزیک

چکیده

در این مقاله با اعمال فرمولبندی سه جسمی با شرایط مرزی تصحیح شده در تقریب مرتبة اول بورن و استفاده از روش مدل الکترون فعال، دامنه الکترونی مرتبة اول و دامنة بین هسته‌ای مرتبة اول محاسبه شده است. با استفاده از دامنه‌های جزیی، سطح مقطع پراکندگی جزیی و کل، برای تشکیل پوزیترونیوم در برخورد پوزیترون با مولکول متان در انرژی‌های میانه، بالا و غیرنسبیتی محاسبه شده‌، سطح مقطع کل با نتایج تجربی موجود مقایسه شده ‌است. محدودة انرژی برخورد eV 400  تا keV 2 و زاویة پراکندگی پوزیترون 0 تا 180 درجه انتخاب گردیده است. سطح مقطع در چارچوب مرکز جرم محاسبه و به چارچوب آزمایشگاه تبدیل شده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Positronium formation in electron capture from Methane molecule: Calculating partial differential and total cross section calculation of the first-order electron and nuclear amplitudes

نویسنده [English]

  • Farideh Shojaei
چکیده [English]

In the present paper, the first-order electron and nuclear amplitudes are calculated in the framework of three-body formalism within corrected boundary conditions in the first order Born approximation and active electron model. Both the differential and total scattering cross sections, for the formation of positronium in collision of positron with methane molecule, are obtained using the differential amplitudes in the non-relativistic intermediate and high impact energies and are compared with the available experimental data. The selected impact energy and positron scattering angle fall in the ranges between 400 eV and 2 keV and 0 and to 180 degree, respectively. The cross section is computed in the center of mass frame and converted to the laboratory frame.

کلیدواژه‌ها [English]

  • Positronium
  • Methane Molecular
  • Corrected Boundary Conditions
  • Electron Capture
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