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دراسة قدرة الايقاف والمدى للبروتونات == Study of Stopping Power and Range for Protons
اسم المؤلف:
مصطفى عبد المحسن عبد العالي
اسم المشرف:
محمد احمد صالح
الموضوع العام:
علوم الفيزياء
السنة:
2009
الموضوع الدقيق:
الفيزياء
الدرجة:
ماجستير
الجامعة:
جامعة النهرين - كلية العلوم - قسم الفيزياء
اللغة:
الانكليزية
مكان الجامعة:
بغداد
الصفحات الاولى:
📎 26T1769 - p.pdf
المستخلص:
The calculation of the value of stopping power and the range for the proton is done by two ways : first, using Bethe - Bloch formula and second, using Bragg - Kleeman rule. The differences between the experimental and theoretical values of stopping power and range required studying the corrections for Bethe - Bloch formula which are represented by the maximum energy and density correction and then comparing the results with experimental values. Using these two formulas it has been found that the results computed by the Bethe - Bloch formula without corrections (maximum energy and density correction) are in agreement with experimental results for βγ ≤ 2 ( E ≤ 2×103MeV ) and for βγ ≤ 102 ( E ≤ 105MeV ) with corrections. The maximum energy and density corrections contributed to decrease the difference with the experimental results for βγ ≥ 102 ( E ≥ 105MeV ).The values of stopping power computed using the Bragg - Kleeman rule are in agreement with experimental results for E ≤ 200MeV and the range values computed using the Bragg - Kleeman rule are in agreement with the results computed using the Bethe - Bloch formula for E ≤ 400MeV .The results show that the energy losses for protons at the high energy values are low and vise versa; the energy losses for protons at the low energy values are high.The present calculations confirm that the proton looses its largest energy at the end of its path in matter
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