کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8208618 | 1532062 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multi-source irradiation facility with improved space configuration for neutron activation analysis: Design optimization
ترجمه فارسی عنوان
امکانات تابش چند منبع با پیکربندی فضای بهبود یافته برای تجزیه و تحلیل فعال سازی نوترون: بهینه سازی طراحی
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
چکیده انگلیسی
A neutron irradiation facility consisting of six 241Am-Be neutron sources of 30â¯Ci total activity and 6.6 à 107 n/s total neutron yield is designed. The sources are embedded in a cubic paraffin wax, which plays a dual role as both moderator and reflector. The sample passage and irradiation channel are represented by a cylindrical path of 5â¯cm diameter passing through the facility core. The proposed design yields a high degree of space symmetry and thermal neutron homogeneity within 98% of flux distribution throughout the irradiated spherical sample of 5â¯cm diameter. The obtained thermal neutron flux is 8.0 à 104 n/cm2.s over the sample volume, with thermal-to-fast and thermal-to-epithermal ratios of 1.20 and 3.35, respectively. The design is optimized for maximizing the thermal neutron flux at sample position using the MCNP-5 code. The irradiation facility is supposed to be employed principally for neutron activation analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Radiation and Isotopes - Volume 135, May 2018, Pages 135-141
Journal: Applied Radiation and Isotopes - Volume 135, May 2018, Pages 135-141
نویسندگان
N.A. Kotb, Ahmed H.M. Solieman, T. El-Zakla, T.Z. Amer, S. Elmeniawi, M.N.H. Comsan,