Etude de la Réponse d’un Détecteur à Semi-Conducteur Germanium Hyper Pure: Application à la Spectrométrie des Rayons Gamma
| المؤلف الرئيسي: | Sekkal, Abd-el-Djalil (Author) |
|---|---|
| مؤلفين آخرين: | Bentouila, O. (Advisor), Belamri, M. (Advisor) |
| التاريخ الميلادي: |
2018
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| موقع: | ورقلة |
| الصفحات: | 1 - 68 |
| رقم MD: | 1169373 |
| نوع المحتوى: | رسائل جامعية |
| اللغة: | الفرنسية |
| الدرجة العلمية: | رسالة ماجستير |
| الجامعة: | جامعة قاصدي مرباح - ورقلة |
| الكلية: | كلية الرياضيات وعلوم المادة |
| الدولة: | الجزائر |
| قواعد المعلومات: | Dissertations |
| مواضيع: | |
| رابط المحتوى: |
عدد مرات التحميل
12
| المستخلص: |
To achieve our objective, which is the study of the response of a hyper-pure germanium semiconductor detector. And its application to gamma-ray spectrometry, it is imperative to measure and control certain parameters of the detection system. We did the previous experiments and we arrived at the following results: -The resolution increases according to the energy for the same distance. But does not vary according to the distance for the same energy. -The influence of energy on the detection efficiency. It decreased by a factor of about 8 as a function of energy for the same distance and by a factor of about 15 with respect to the same energy and as a function of distance. The detection efficiency is even greater when the energy is low and the distance is low. -The different responses of the detector’s efficiency for a given energy according to the distance showed an exponential decay. It decreases according to the energy. The probability of interaction of gammas with the germanium crystal has a great influence. -The dead time decreases with distance. It decreased by 14 for a distance of 0 cm to 4 for a distance of 10 cm. So, the effect of the detector’s response to distance is a very sensitive parameter. It will be necessary to proceed to a correction of the count by a factor taking into account the dead time. The more energy increases the less events are produced in the crystal. |
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