Dose Calculations and 137Cs Shot Log

I need to change the exposed doses by changing from seconds to hours. Unit problems.

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 (mR)
9/8/17	1	5660	30cm	11	18.7188	30148.8
9/8/17	1	5660	30cm	11	18.7188	30148.8
9/26/17	2	4500	30cm	11	18.7188	23398.6
9/26/17	2	4500	30cm	11	18.7188	23398.6

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 (mR)
10/12/17	1	284.04	30.5cm	3	1476.92

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

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]

Nanodot OSLS

OSL #	Listed Dose (mRad)	Measured Dose (mRad)	Average Dose (mRad)
DN08252102C	Unexposed	1161.413	\
DN08241536W	Unexposed	1064.58	1148.9367
DN08229824R	Unexposed	1220.817	/

Reproducibility with 137Cs