LB May 2017 Det A Efficiency

DetB Calibration is A = -2.8392 +/- 0.592828 , B = 0.815444 +/- 0.000630482

Det A Intercept = -12.208800 slope =1.021270

Theoretical Activities

Ba-133, 10.54 uCi on July 1, 2008, half life 10.51 years, 32.9% for 80.9979 keV line, 18.34% for 302.8508 keV line, 62.05% for the 356.0129 keV line. The sample serial # 129791 had an activity of 5.87 uCi on May 27, 2017

[math]\left (0.329 \right )\left ( 5.87 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)= 71455.51 Hz [/math] for the 80.9979 keV line

[math]\left (0.1834 \right )\left ( 5.87 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)= 39745.77 Hz [/math] for the 302.8508 keV line

[math]\left (0.6205 \right )\left ( 5.87 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)= 134874.99 Hz [/math] for the 302.8508 keV line

Actual Efficiency

There is a small issue with the calibration when plotting the results in ROOT. The binning along with the calibration create a picket fencing effect that incorrectly displays the results. The effect is shown below.

Run	Source	Energy (keV)	Channel #	Position	Expected Rate (Hz)	ROOT Window (by channel #)	HpGe Rate (Hz)	HpGe Detector A Efficiency (%)
Ba133_DetA_Farthest_DetB_posN_Efficiency.root	Ba-133	80.9979	92	Farthest Back Position	71455.51	[88,98]	25.78 +/- 0.078	0.0036
Ba133_DetA_Pos44cm_DetB_PosA_Efficiency.root	Ba-133	80.9979	92	44cm From Detector	71455.51	206.97 +/- 0.38	0.29
Ba133_DetA_Pos30_Efficiency.root	Ba-133	80.9979	92	30cm From Detector	71455.51	[88,98]	235.49 +/- 0.79	0.33
Ba133_DetA_Pos20_Efficiency.root	Ba-133	80.9979	92	20cm From Detector	71455.51	[88,98]	478.73 +/- 0.8439	0.70