Difference between revisions of "Calibration Info"
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<math>\dot R = \frac {\Gamma A }{ D^2} </math> where <math>\boldsymbol{\Gamma} = 3.3 \frac {(cm^2)(R)}{(mCi)(hr)} = .33 \frac {(m^2)(R)}{(Ci)(hr)} </math> , <math>\mathbf{A} = 9.3 Ci </math> , <math>\mathbf{D}=(\text{Distance to faceplate} + 11.2cm) </math> | <math>\dot R = \frac {\Gamma A }{ D^2} </math> where <math>\boldsymbol{\Gamma} = 3.3 \frac {(cm^2)(R)}{(mCi)(hr)} = .33 \frac {(m^2)(R)}{(Ci)(hr)} </math> , <math>\mathbf{A} = 9.3 Ci </math> , <math>\mathbf{D}=(\text{Distance to faceplate} + 11.2cm) </math> | ||
| − | There is an adjustment distance of 11.2cm which accounts for the distance from the faceplate to the <math> ^{137}Cs</math> source | + | There is an adjustment distance of 11.2cm which accounts for the distance from the faceplate to the surface of the <math> ^{137}Cs</math> source |
Total exposures are calculated by <math>\int\limits_{t_0}^{t_f}\dot R\ dt </math> | Total exposures are calculated by <math>\int\limits_{t_0}^{t_f}\dot R\ dt </math> | ||
Revision as of 22:57, 15 May 2018
To fully understand the characteristics of the Nanodot OSLs, a custom calibration was needed. This calibration is used in lieu of the calibration created by the OSL reader using the pre-dosed OSLs from the manufacturer. To begin the calibration, a set of fifteen unexposed Nanodot OSLs, chosen at random, were selected and exposed to a 9.3Ci 137Cs source. Using a distance of 30cm from the faceplate of the source, the exposure rate was calculated in Roentgen using
where , ,
There is an adjustment distance of 11.2cm which accounts for the distance from the faceplate to the surface of the source
Total exposures are calculated by