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Development of non-destructive passive gamma assay techniques for verification of safeguarded nuclear materials / Rasha Ali Mahmoud Mohammed Eltayeban ; Supervised Abdallah Abdelsalam Mohamed , Abdelfatah Abdelaal Hamed , Sayed Ali Elmongy

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Rasha Ali Mahmoud Mohammed Eltayeban , 2016Description: 123 P. : charts ; 25cmOther title:
  • تطوير التقنيات اللإاتلافية للتحقق من المواد النووية [Added title page title]
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Dissertation note: Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Physics Summary: This work aims mainly at development and improvement of the performance of the cylindrical (standard nuclear material -SNM) and point sources (radioactive 137Cs) assay. New geometries and arrays of detectors were installed and investigated to reduce the unwanted noises and interactions. Two different detectors arrays design are optimized and presented with respect to the analyzed nuclear material samples. The arrays consist of three Sodium Iodide (NaI) detectors; one of them is in annular perpendicular position and the others are guards surrounding the main Hyper Pure Germanium Detector (HPGe). An enhanced Peak-Compton (P/C) ratios were obtained and discussed. Calculations were performed using a The Monte Carlo code (MCNP5) for estimating the optimum conditions to the design at which the systematic error is being as low as possible. The calculations required the knowledge and data of the internal dimensions of the used detectors and samples and the distances between them. The results calculated by MCNP5 at different angles proved that the optimum position for the array is when the guard detectors (NaI) is positioned at zero angle from the x-axis of the main HpGe detector (the array of detectors design number 2)
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.20.Ph.D.2016.Ra.D (Browse shelf(Opens below)) Not for loan 01010110069064000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.20.Ph.D.2016.Ra.D (Browse shelf(Opens below)) 69064.CD Not for loan 01020110069064000

Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Physics

This work aims mainly at development and improvement of the performance of the cylindrical (standard nuclear material -SNM) and point sources (radioactive 137Cs) assay. New geometries and arrays of detectors were installed and investigated to reduce the unwanted noises and interactions. Two different detectors arrays design are optimized and presented with respect to the analyzed nuclear material samples. The arrays consist of three Sodium Iodide (NaI) detectors; one of them is in annular perpendicular position and the others are guards surrounding the main Hyper Pure Germanium Detector (HPGe). An enhanced Peak-Compton (P/C) ratios were obtained and discussed. Calculations were performed using a The Monte Carlo code (MCNP5) for estimating the optimum conditions to the design at which the systematic error is being as low as possible. The calculations required the knowledge and data of the internal dimensions of the used detectors and samples and the distances between them. The results calculated by MCNP5 at different angles proved that the optimum position for the array is when the guard detectors (NaI) is positioned at zero angle from the x-axis of the main HpGe detector (the array of detectors design number 2)

Issued also as CD

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