محاسبه سطح مقطع شکافت به وسیله تابش گاما برای ایزوتوپهای اورانیوم با کمک پتانسیل سه قله ای

نوع مقاله : مقاله پژوهشی کامل

نویسندگان

1 عضو هیأت علمی گروه فیزیک هسته‌ای، دانشکده علوم پایه، پردیس دانشگاه مازندران، مازندران، ایران

2 عضو هیات علمی گروه فیزیک هسته‌ای، دانشکده علوم پایه، پردیس دانشگاه مازندران، مازندران، ایران

چکیده

در این تحقیق به مقایسه سطح مقطع شکافت توسط اشعه گاما (شکافت فوتونی) ایزوتوپهای اورانیوم, U239-230 به کمک شبیه سازی با استفاده ازمدل اپتیکی پرداخته ایم. برای محاسبه سطح مقطع شکافت فوتونی از احتمال گذار سد پتانسیل سه قله ای استفاده کرده ایم. همچنین برای محاسبه چگالی ترازهای هسته مرکب؛ از مدل پیشرفته ابرشاره1 سود جسته ایم. مقایسه سطح مقطع شکافت فوتونی برای این ایزوتوپها در محدود گسترده ای از انرژی فوتون فرودی و بوسیله نتایج حاصل ازنرم افزار امپایر2 محاسبه و با نتایج تجربی مقایسه گردیده است. سطح مقطع شکافت برای کلیه ایزوتوپهای هسته اورانیوم بصورت تابعی از انرژی در گستره از 5 تا 20 مگا الکترون ولت رسم شده است. نتایج حاصل از محاسبات تطابق بسیار خوبی با مقادیر اندازه گیری شده نشان می دهند.

کلیدواژه‌ها


عنوان مقاله [English]

Photo-fission Cross Section of Uranium Isotopes using three humps barrier

نویسندگان [English]

  • Mohammad Reza Pahlavani 1
  • Payam Mehdiupour Kaldiani 2
1 Faculty member, Department of Nuclear Physics, Faculty of Basic Science, University of Mazandaran, Babolsar, Iran
2 Department of Nuclear Physics, Faculty of Basic Science, University of Mazandaran, Babolsar, Iran
چکیده [English]

In this investigation calculated cross section of induced photo-fission of uranium Isotopes, 230-239U using simulation through optical model are compared with experimental data. To obtain photo-fission cross section transition probability through three humps fission barrier is used. Also, to calculate level density of compound nucleus, improved version of Enhanced Generalized Super-fluid Model (EGSM) is employed. Simulated cross sections using Empire code for these Isotopes in a wide range of energy are compared with available experimental data. Cross sections for different isotopes of uranium as a function of energy in the range 5 to 20 MeV are plotted. Good agreement achieved when the results of Empire code are compared with available experimental data.

کلیدواژه‌ها [English]

  • photo-fission
  • Cross section
  • three humps barrier
  • level densityو Optical Model
  • Uranium isotopes
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