نوع مقاله : مقاله پژوهشی

نویسندگان

گروه فیزیک، دانشکده علوم پایه، واحد نراق، دانشگاه آزاد اسلامی، صندوق پستی: 37961-58719، نراق - ایران

10.24200/nst.2022.1456

چکیده

در این پژوهش مقادیر انرژی تحریکی کل (TXE) پاره‌های شکافت نوترونی برای ایزوتوپ‌های پلوتونیوم با استفاده از دو روش محاسبه شده‌اند. ابتدا نتایج انرژی تحریکی کل پاره‌های شکافت محاسبه شده دو روش برای شکافت Pu339 با هم مقایسه شده‌اند. سپس مقادیر TXE محاسبه شده با روش دوم را بر اساس مقادیر TXE روش اول که از تعریف اصلی نتیجه می‌شوند، بهینه‌سازی نموده‌ایم. با این بهینه‌سازی توزیع جرمی TXE برای ایزوتوپ‌های Pu241 و Pu242 که دارای مقادیر تجربی برای انرژی جنبشی کل پاره‌های شکافت هستند به دست آمده‌اند. هم‌چنین، توزیع جرمی انرژی تحریکی کل پاره‌های شکافت برای شکافت نوترونی بقیه ایزوتوپ‌های پلوتونیوم با هر دو روش پیش‌بینی شده‌اند. مقادیر انرژی تحریکی کل پاره‌های شکافت برای ایزوتوپ‌های پلوتونیوم بین 15 تا MeV 35 می‌باشند که در ناحیه متقارن افزایش چشمگیری دارند.

کلیدواژه‌ها

عنوان مقاله [English]

Calculation of the total excitation energy for neutron fission of plutonium isotopes and investigation of its systematic method

نویسندگان [English]

  • P. Mehdipour Kaldiani
  • M. Jamiati

Department of Physics, Faculty of Basic Sciences, Naragh Branch, Islamic Azad University, P.O. Box: 58719-37961, Naragh - Iran

چکیده [English]

In this study,the values of total excitation energy (TXE) of fission fragments are calculated for neutron fission of Plutonium isotopes using two methods. At first, the calculated TXE values using two methods are compared for neutron fission of plutonium 239. Then, the calculated TXE values using the second method are improved based on the results of the first method. TXE distribution of plutonium 241 and 242, which have the measured fission fragment total kinetic energy, are calculated using two methods and according to the method modification. Also, the TXE distributions for neutron fission of other plutonium isotopes are predicted. The values of total excitation energy of fission fragments for plutonium isotopes are between 15 MeV and 35 MeV. The TXE values have a sudden increase in the symmetric region.

کلیدواژه‌ها [English]

  • The total excitation energy
  • scission point model
  • neutron fission
  • The deformation of fission fragments
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