کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1834477 1526714 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The Impact of Intermediate Structure on the Average Fission Cross Sections
ترجمه فارسی عنوان
تأثیر ساختار متوسط ​​در بخش های تقسیم متوسط ​​تقسیم
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
چکیده انگلیسی

This paper discusses two common approximations used to calculate average fission cross sections over the compound energy range: the disregard of the WII factor and the Porter-Thomas hypothesis made on the double barrier fission width distribution. By reference to a Monte Carlo-type calculation of formal R-matrix fission widths, this work estimates an overall error ranging from 12% to 20% on the fission cross section in the case of the 239Pu fissile isotope in the energy domain from 1 to 100 keV with very significant impact on the competing capture cross section. This work is part of a recent and very comprehensive formal R-matrix study over the Pu isotope series and is able to give some hints for significant accuracy improvements in the treatment of the fission channel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Data Sheets - Volume 118, April 2014, Pages 211-215