TY  - BOOK
AU  - Soad Magdy Tadros Michael 
AU  - Gamal Riad Saad , 
AU  - Magdi Mikhail Naoum , 
AU  - Wafaa Bader Eldin Mostafa , 
TI  - Physico-chemical studies on some new dosimeters for possible use in radiation processing dosimetry / 
PY  - 2021///
CY  - Cairo : 
PB  - Soad Magdy Tadros Michael  , 
KW  - Ag nanoparticles
KW  - Dosimetry
KW  - Radiochromic gel
N1  - Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Physical Chemistry; Issued also as CD
N2  - The first part of this thesis aims to develop and optimize the formulation of a radiation-sensitive material of silver nitrate in gelatin, a capping agent, to  prepare radiochromic gel dosimeters suitable for dosimetry applications up to 100  Gy. Gamma radiation-induced Ag nanoparticles (NPs) formation in silver nitrate gel dosimeter at different silver nitrate concentration, gelatin %, isopropanol % and pH was investigated. The absorption spectrum of the Þ-irradiated gel dosimeter exhibited a Surface Plasmon Resonance band (SPR) at a wavelength of 450 nm nm indicating AgNPs formation upon Þ-irradiation.The intensity of this  peak grows linearly with increasing absorbed doses up to 100 Gy. The sensitivity  of radiation increases with the increase of Ag⁺ ion concentrations and the decrease  of gelatin content. In addition, using isopropanol enhanced the development of AgNPs in the gel dosimeter. The increase of isopropanol in the gel (100 mM  The first part of this thesis aims to develop and optimize the formulation of a radiation-sensitive material of silver nitrate in gelatin, a capping agent, to  prepare radiochromic gel dosimeters suitable for dosimetry applications up to 100 Gy. Gamma radiation-induced Ag nanoparticles (NPs) formation in silver nitrate gel dosimeter at different silver nitrate concentration, gelatin %, isopropanol % and pH was investigated. The absorption spectrum of the Þ-irradiated gel dosimeter exhibited a Surface Plasmon Resonance band (SPR) at a wavelength of 450 nm nm indicating AgNPs formation upon Þ-irradiation. The intensity of this  peak grows linearly with increasing absorbed doses up to 100 Gy. The sensitivity  of radiation increases with the increase of Ag+ ion concentrations and the decrease of gelatin content. In addition, using isopropanol enhanced the development of AgNPs in the gel dosimeter. The increase of isopropanol in the gel (100 mM Ag+) from 0 to 20% enhanced the radiation sensitivity by 16.75%
UR  - http://172.23.153.220/th.pdf
ER  -