LB May 2017 Det A Efficiency

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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 356.0129 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 on Detector A 71455.51 [88,98] 25.78 +/- 0.078 0.0036
Ba133_DetA_Pos90_DetB_23_6cm_Efficiency.root Ba-133 80.9979 92 90cm From Detector A 71455,51 [88,98] 58.37 +\- 0.15 0.08
Ba133_DetA_Pos70_DetB_PosD_Efficiency.root Ba-133 80.9979 92 70cm From Detector A 71455.51 [88,98] 50.07 +/- 0.19 0.07
Ba133_DetA_Pos50_DetB_PosC_Efficiency.root Ba-133 80.9979 92 50cm From Detector A 71455.51 [88,98] 142.85 +/- 0.28 0.20
Ba133_DetA_Pos44cm_DetB_PosA_Efficiency.root Ba-133 80.9979 92 44cm From Detector A 71455.51 [88,98]] 206.97 +/- 0.38 0.29
Ba133_DetA_Pos30_Efficiency.root Ba-133 80.9979 92 30cm From Detector A 71455.51 [88,98] 235.49 +/- 0.79 0.33
Ba133_DetA_Pos20_Efficiency.root Ba-133 80.9979 92 20cm From Detector A 71455.51 [88,98] 478.73 +/- 0.8439 0.70
Ba133_DetA_Farthest_DetB_posN_Efficiency.root Ba-133 302.85 310 Farthest Position On Detector A 39745.77 [305,315] 11.49 +/- 0.0110 0.0289
Ba133_DetA_Pos90_DetB_23_6cm_Efficiency.root Ba-133 302.85 310 90cm From Detector A 39745.77 [305,315] 12.645 +/- 0.0227 0.0318
Ba133_DetA_Pos70_DetB_PosD_Efficiency.root Ba-133 302.85 310 70cm From Detector A 39745.77 [305,315] 20.35 +/- 0.0223 0.0512
Ba133_DetA_Pos50_DetB_PosC_Efficiency.root Ba-133 302.85 310 50cm From Detector A 39745.77 [305,315]] 40.06 +/- 0.0260 0.1008
Ba133_DetA_Pos44cm_DetB_PosA_Efficiency.root Ba-133 302.85 310 44cm From Detector A 39745.77 [305,315] 49.86 +/- 0.0287 0.1254
Ba133_DetA_Pos30_Efficiency.root Ba-133 302.85 310 30cm From Detector A 39745.77 [305,315] 99.76 +/- 0.0393 0.2510
Ba133_DetA_Pos20_Efficiency.root Ba-133 302.85 310 20cm From Detector A 39745.77 [305,315] 196.45 +/- 0.0529 0.4943
Ba133_DetA_Farthest_DetB_posN_Efficiency.root Ba-133 Farthest Position Det A [350,375]
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