Monte carlo simulation of compton backscattering at the comet nucleus surface

العناوين الأخرى

محاكاة مونت كارلو للاستطارة الخلفية للفوتونات عن سطح نواة المذنب

مقدم أطروحة جامعية

al-Husni, Sarah Salah

مشرف أطروحة جامعية

Ilias, Mazin Manuil

أعضاء اللجنة

Muhammad, Faysal Ghazi
Kazim, Ala Baqir
Khalaf, Salman Zaydan

الجامعة

جامعة بغداد

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفلك و الفضاء

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2011

الملخص الإنجليزي

Monte Carlo simulation of scattering and absorption in bulk materials has been used to investigate the design parameters specially the variation of backscattered count rate with density and composition.

Gamma backscatter densitometer use the Compton scattering of gamma ray photons in bulk material.

A source of gamma photons 662 keV from a collimated 137Cs and 60 keV from a collimated 241Am source are placed at the surface of the bulk sample to inject gamma photons into material.

A detector is placed a short distance along the surface from the source to count photons scattered out of the material shielding the source to prevent photons from reaching the detector directly.

A FORTRAN program has been written to model the interaction of photons in a bulk material.

The elements and compositions of a comet material have been used such as (H2O, C, SiO2, Mg2SiO4, and Fe2SiO4).

The results of calculation which have been obtained are compared with the published results.

It appears in a good agreement with behavior.

The backscatter and attenuation techniques have been merged in one geometry arrangement, consider that the new and not work previous and appeared the results of tests very good

التخصصات الرئيسية

الفلك و علومه

عدد الصفحات

96

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-603945