No abstract

‫البحث‬ ‫ملخص‬ ‫ال‬ ‫هذا‬ ‫في‬ ‫عمى‬ ‫يعتمد‬ ‫عددية‬ ‫امثمية‬ ‫نموذج‬ ‫صياغة‬ ‫تم‬ ‫بحث‬ ‫يبية‬ ‫التجر‬ ‫القيم‬ ‫ل‬ ‫من‬ ‫كل‬ ‫الضغط‬ ‫يبي‬ ‫التجر‬ (0-120) kbar ‫و‬ ‫تداد‬ ‫االر‬ ‫من‬ ‫الخالي‬ ‫الجزء‬ r fexp =f p /f 0 ‫لتوضيح‬ ‫وذلك‬ ‫تأثير‬ ‫الثاني‬ ‫و‬ ‫األول‬ ‫كرونيشن‬ ‫ومعامل‬ ‫ديباي‬ ‫ة‬ ‫ار‬ ‫حر‬ ‫درجة‬ ‫من‬ ‫كل‬ ‫عمى‬ ‫الضغط‬ (, q) ‫اذ‬ ‫أمكن‬ ‫استنتاج‬ ‫ا‬ ‫المثمى‬ ‫لقيمة‬ ‫م‬ q ‫القيمة‬ ‫وباستخدام‬ ‫لمنحاس‬ ‫المثمى‬ ‫الغرفة‬ ‫ة‬ ‫ار‬ ‫حر‬ ‫درجة‬ ‫عند‬ ‫دبياي‬ ‫يب‬ ‫تقر‬ ‫مع‬ ‫الضغط‬ ‫تاثير‬ ‫وتحت‬ ‫تداد‬ ‫االر‬ ‫من‬ ‫الخالي‬ ‫الجزء‬ ‫حساب‬ ‫تم‬ r ftheor =f p /f o ‫ألشعة‬ ‫المنبعثة‬ ‫كاما‬ ‫من‬ Fe 57 ‫في‬ Cu ( Fe 57 : Cu ) ‫العممية‬ ‫القيم‬ ‫مع‬ ‫متطابقة‬ ‫النتائج‬ ‫وكانت‬ ‫المأخوذة‬ ‫مصادر‬ ‫من‬ ‫أخ‬ ‫رى‬ . ABSTRACTIn the present work a numerical optimization model is constructed which is based on the experimental pressure (p exp ) and experimental recoilless fraction ratio (r fexp =f p /f 0 ) data in order to explain the pressure effect on Gruneisen parameters(, q) and Debye temperature.The model was able to compute the optimum q value for copper, the observed optimum value for q was used with Debye approximation at room temperature under pressure to calculate the recoilless fraction ratio r ftheor =f p /f o for (Fe 57 -Cu), It has been found that the calculated results of (ffraction) are in good agreement with the experimental data of recoilless fraction ratio.