Enhancing the Performance of a Dual Particle Imaging System Using Geant 4 Monte Carlo Simulations Toolkit

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

The development and optimization of a dual gamma-neutron imaging system can offer significant advancements in the industrial field in general, and in the nuclear security field in particular, as special nuclear materials (SNM) of interest emit both particle types. In this study, a multi-layered, portable, real-time dual gamma-neutron imaging system that maps thermal neutrons, fast neutrons, and gamma-ray photons has been optimized using the Geant4 Monte Carlo simulation toolkit. The current design allows the system to image, localize, and characterize a wide range of radioactive sources and special nuclear materials (SNM). This project focuses on enhancing the current design in three key areas. The first area of enhancement involved examining the EJ-212 plastic scintillator detector as a potential replacement for the EJ-204 plastic scintillator in the first layer. It was found that EJ-212 possesses a low mass attenuation coefficient and a Compton scattering probability of less than 15% for gamma energies exceeding 1 MeV. The second enhancement area involved simulations conducted using four radioactive sources — ²⁵²Cf, ²³⁵U, ¹³⁷Cs, and ⁶⁰Co — to test different separation distances between the three layers of the system. The results showed that increasing the separation distance by just a few centimeters significantly impacts the detection efficiency of both gamma rays and neutrons. Finally, the external shielding of the system was tested as the third area of enhancement. The investigated design included two different materials: stainless steel and polyethylene. The results showed that when a 3 mm layer of stainless steel was coated with an additional 3 mm layer of polyethylene, background radiation noise was minimized.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0add38d4-6c07-4948-bea9-5f297c2061b5

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

0add38d4-6c07-4948-bea9-5f297c2061b5_1.pdf

بيانات النشر

ترجمة العنوان

تحسين أداء نظام التصوير المزدوج للجسيمات باستخدام أدوات Geant4 للمحاكاة

ألقاب المؤلفين

[{"name_ar":"Hajir Al Hamrashdi","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"Saluma Mohammed Al-Mamariyah ","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

English

المصدر والدورية

اسم المصدر

Enhancing the Performance of a Dual Particle Imaging System Using Geant 4 Monte Carlo Simulations Toolkit

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

Image processing - Mathematical models - Oman - Gamma rays - Neutrons

إشراف وإعداد

الإشراف

Hajir Al Hamrashdi

الإعداد

Saluma Mohammed Al-Mamariyah

الاقتباسات الببليوغرافية