Dose Calculations and 137Cs Shot Log

Source Calibration and Dose Rate Data

Date	Initial Source Strength (Ci)	Current Source Strength (Ci)	Distance to Faceplate (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 R = \frac {\Gamma A }{ D^2} [/math] where [math]\boldsymbol{\Gamma} = 3.3 \frac {(cm^2)(R)}{(mCi)(hr)} = .35 \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

137Cs Shot Log

Dot OSLs

Date	Run Number	Run Time (s)	Distance to Faceplate	Number of OSLs in Stack	Dose Rate (R/hr)	Total Exposed Dose (R)
9/8/17	1	5660	30cm	11	18.7188	108536
9/8/17	1	5660	30cm	11	18.7188	108536
9/26/17	2	4500	30cm	11	18.7188	84234.8
9/26/17	2	4500	30cm	11	18.7188	84234.8

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

In these calculations, [math]\Gamma = 0.35 \frac {(m^2)(R)}{(Ci)(hr)} [/math]

Nanodot OSL Quality Control

Date	Run Number	Run Time (s)	Distance to Faceplate	Number of OSLs	Total Exposed Dose (R)
10/12/17	1	284.04	30.5cm	3	5242.02

Calibration OSLs

OSL #	Listed Dose (mRad)	Measured Dose (mRad)	Average Dose (mRad)	DN08276339J	Unexposed	71.19332	\
DN08276683L	Unexposed	70.39211	72.10899
DN08258554P	Unexposed	74.74154	/
DN10806640H	500	687.3246	\
DN10608908Z	500	681.0294	683.2422333
DN10806620J	500	681.3727	/
DN105057582	3000	3563.558	\
DN104085766	3000	3522.352	3567.258333
DN10608909X	3000	3615.865	/
DN108066085	50000	55966.55	\
DN103091798	50000	55420.36	55622.12
DN104086665	50000	55479.45	/
DN10606601L	100000	111610.5	\
DN106066095	100000	114271.2	114191.3333
DN10712163M	100000	116692.3	/

QC OSLs Averages OSL # Listed Dose (mRad) Measured Dose (mRad) Average Dose (mRad) DN08264870R Unexposed 69.36198 \ DN082701640 Unexposed 77.25963 74.74153667 DN08269802P Unexposed 77.603 / DN10712168C 1000 1235.238 \ DN10309170Q 1000 1223.106 1226.119667 DN102095379 1000 1220.015 /

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

Reproducibility with 137Cs