تحليل التشتت المرن للبيونات المشحونة عن نواة الكالسيوم 40 على 50 مليون الكترون فولط
Abstract
A simple local potential, extracted originally from available phase shifts using an inverse scattering theory with Klein-Gordon equation, was parameterized to describe the elastic scattering of charged pions from 40Ca at 50 MeV. This will be a stringent test for the correctness of the simple local potential form. The Coulomb effects are simply considered by the fact that the π – interaction with nucleons in the nucleus is at an effectively higher energy than the π +. This procedure approximately is equivalent to other complicated theoretical treatments. The good agreement with the experimental data assures the validity of this approach and the success of our potential. This also provides a strong motivation to study the scattering of charged pions at other energies and for other nuclei where experimental data are available.تمّ استخدام الجهد الموضعي البسيط المشتق أصلاً من الإزاحات الطورية باستخدام نظرية التشتت العكسي ومعادلة كلاين – جوردن وذلك بتغيير معاملاته لوصف التصادم المرن للبيونات المشحونة عن الكالسيوم 40 عند طاقة 50 مليون إلكترون فولط. هذه الدراسة ستؤكد صحة الجهد الموضعي البسيط ( والذي تمّ اقتراحه وتطويره من قبلنا).
تمّ اعتبار التأثيرات الكولومية ببساطة بناءً على حقيقة أنّ البيونات السالبة تتفاعل مع نيوكليونات النواة بطاقة فعّالة أكبر من البيونات الموجبة. تكافئ هذه الطريقة تقريباً المعالجات النظرية المعقّدة.
يؤكد التوافق الحسن مع القراءات التجريبية صلاحية هذه الطريقة ونجاح هذا الجهد. وهذا يعطي أيضاً دفعاً قوياً لدراسة تشتت البيونات المشحونة على طاقات أخري وعن نويات أخرى حيثما تتوفر النتائج التجريبية.
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