تأثیر الأشعة السینیة X-Ray فی معدلات سرعة القشط (VB وVD) لکاشف الأثر النووی CR-39

نوع المقالة : بحث

المؤلفون

1 قسم الفیزیاء، کلیة العلوم، جامعة کرکوک، کرکوک، العراق.

2 قسم الفیزیاء، کلیة التربیة-الحویجة، جامعة کرکوک، کرکوک، العراق.

الملخص

یهدف البحث الى دراسة تأثیر الاشعة السینیة X-ray على عدد من المعلمات کاشف الاثر النووی CR-39 المشعع بجسیمات الفا منها اقطار الاثار، ومعدل القشط العام ومعدل نمو قطر الاثر. تم تعریض الکواشف الى الاشعة السینیة بفولتیة  5 kV وتیار 0.01 mA لازمان مختلفة h (0.5-2.5) بفاصل 0.5 h قبل التشعیع بجسیمات الفا وبعده بطاقةMeV  2.5 من مصدر امریشیوم  241Am. فقد وجد أن استجابة الکاشف فی حالة التعریض (X-ray+Alpha) اکبر مما فی حالة (Alpha+X-ray) بالمقارنة مع حالة القیاسیة المشععة بجسیمات الفا فقط. کذلک وجد أن اقطار الاثار ومعدل القشط العام یزدادان مع تقدم زمن التعریض للأشعة السینیة للحالتین کلتیهما, قبل التشعیع  بجسیمات الفا وبعدها.

الكلمات الرئيسة


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