معالجة رقمية وتحليلية للاثار الناتجة من التشعيع بالمصدر النيوتروني 241Am - 9Be على بعض كواشف الاثار النووي للحالة الصلبة == Digital Processing and Analysis for the Tracks Produced From the Irradiation with Neutrons Source 241Am - 9Be on Some of Solid State Nuclear Track Detectors
Author name:
مصطفى يوسف رجب
Supervisor name:
حسين علي الجبوري
General topic:
Physics
Specific topic:
Nuclear and Environmental Physics
Degree:
Master
University:
Al-Nahrain University - College Of Science - Physics Department
Language:
English
University location:
Baghdad
First pages:
26T1719 - p.pdf
Abstract:
Image processing technique was used in a lot of studies and research and it concluded , including a number of mathematical relations . In this study , two programs were used , the first one; MATLAB program and second Image - J program . These programs were used to tracks analysis of α - particles on the nuclear track detectors type CR - 39 and CN - 85 . Where irradiated detectors by thermal neutrons from (241Am - 9Be) source with activity 12Ci and neutron flux 105 n.cm - 2.s - 1 . Which obtained on incident α - particles for detectors through 10B(n, α)7Li interaction after covered it with boric acid H3Bo3 pellets . The irradiation times - TD for both detectors were 4h , 8h , 16h and 24h .Through the analyze irradiated detectors of using MATLAB outputs for found the following relationships : a)The irradiation time - TD has behavior linear relationships with following nuclear track parameters, Total track number - NT, Maximum track number - MRD (with depended on track diameter - DT at range of radiation response region 2.5μm - 4μm and 2.5μm - 5μm for CR - 39 and CN - 85 detector respectively) and Maximum track number - MD (without depending on track diameter - DT). b) The irradiation time - TD has behavior exponential relationship with maximum track number - MRA (with depended on track area - AT ) at range of radiation response region 7μm2 - 24μm2 and 9μm2 - 35μm2 for both CR - 39 and CN - 85 detector respectively. c) The irradiation time - TD has behavior a logarithmic relationship with maximum track number - MA (without depending on track area - AT).While through the analyze of outputs Image - J program for irradiated detectors found the irradiation time - TD has behavior linear relationships with following nuclear track detector parameters : a) Total track number - NT. b) Maximum track number - MRA (with depended on track area - AT ) at range of radiation response region 12 μm2 - 24μm2 and 5 μm2 - 27μm2 for both CR - 39 and CN - 85 detector respectively. c) Maximum track number - MA (without depending on track area - AT)This study show that MATLAB program was more analytical and accuracy from Image - J program , through the logarithmic behavior for both detectors between irradiation time - TD with the maximum track number - MA (without depending on track area - AT). There is the possibility of future use image analysis of MATLAB program in the other nuclear track parameters analysis , including ; etched velocity - Vt, , track diameter - Dt , critical angle of nuclear track - θt , nuclear track depth - Dp .The image analyze technique for nuclear track detector which obtained from this study especially with regard to track diameter - TD can be take into account for classification of α - particle emitters , In addition to introduce this technique in preparation of nano - filters and nono - membrane in nanotechnology fields
