Dose Calculations and 137Cs Shot Log

Source Calibration and Dose Rate Data

Date	Initial Source Strength (Ci)	Current Source Strength (Ci)	Distance to Source (cm)	Exposure Rate (Roentgen/hr)°
6/27/17	20	9.3	30.5	17.691
9/11/17	20	9.3	30.5	17.606

°Calculated by TSO using [math]\dot x = \frac {\Gamma A }{ D^2} [/math] where [math] '''\Gamma''' = 3.3 \frac {(cm^2)(R)}{(mCi)(hr)} [/math] , [math]'''A''' = 9.3 Ci [/math] , [math]'''D'''=(\text{Distance to faceplate} + 11.2cm) [/math]

Total dose calculated by [math]\int\limits_{t_0}^{t_f}\dot x\ dt [/math]

137Cs Shot Log

Dot OSLs

Date	Run Number	Run Time (s)	Distance to Source	Number of OSLs in Stack
9/8/17	1	5660	30cm	11
9/8/17	1	5660	30cm	11
9/26/17	2	4500	30cm	11
9/26/17	2	4500	30cm	11

Nanodot OSL Quality Control

Date	Run Number	Run Time (s)	Distance to Source	Number of OSLs	Total Exposed Dose	Measured Dose	Adjusted Dose
10/12/17	1	284.04	30.5cm	3	-	-	-

Reproducibility with 137Cs