نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار فیزیک هسته ای، گروه فیزیک، دانشکده علوم پایه، دانشگاه اراک
2 دانشیار فیزیک هسته ای، گروه فیزیک، دانشکده علوم پایه، دانشگاه اراک
3 کارشناس ارشد فیزیک هسته ای، گروه فیزیک، دانشکده علوم پایه، دانشگاه اراک
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this paper, design and construction of multipurpose neutron moderator, collimator and shielding were studied for Am-Be neutron source. Monte Carlo Code MCNP4X was used to obtain the maximum neutron flux in the collimator outlet for various moderator materials. Between of moderator material such H2O, D2O, C, Be, BeO and paraffin, the solidparaffin with molecular formula C25H52 has been chosen which has optimum efficient and minimum Thermalization Factor (TF) as 9.6×1010 cm2. Using a collimator design assembly it was possible to obtain a normalized thermal neutron flux, equals 2.29×10-5( ) at an effective collimator ratio of 4.4. For various channel outlet of designed neutron moderator, neutron and photon flux calculated. The shielding optimization process significantly reduced total dose equivalent rates. Neutron and gamma dose measured that are in good agreement with MCNP4X code calculation.
کلیدواژهها [English]