LB April Efficiency Calculations

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Na-22, 10.19 uCi on July 15, 2013, half life 2.602 +/- 0.002 years, 99.937% for 1274.52 and 178.8 for 511 line , activity in Feb 4, 2017 =3.945 uCi

= [math]\left (0.99937 \right )\left ( 3.945 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)= 145873.0421 Hz [/math] for the 1274 line


Run Source Energy (keV) Position Expected Rate (Hz) ROOT Window HpGe Rate (Hz) Detector B Efficiency (%)
Ba133_3.9cm_detB Ba-133 81 3.9cm 8168.083 [76:86] 137.12 +/- 0.6266 1.68
Ba133_3.9cm_detB Ba-133 356 3.9cm 15405.15 [352:360] 191.21 +/- 0.074 1.24
Ba133_4.1cm_detB Ba-133 81 4.1cm 8168.083 [76:86] 137.5 +/- 0.6984 1.68
Ba133_4.1cm_detB Ba-33 356 4.1cm 15405.15 [352:360] 190.44 +/- 0.08 1.24
Ba133_7.9cm_detB Ba-133 81 7.9cm 62348.8887 [76:86] 345.36 +/- 1.32 0.55
Ba133_7.9cm_detB Ba-133 356 7.9cm 117591.1412 [352:360] 494.24 +/- 0.0954 0.42
Ba133_8.1cm_detB Ba-133 81 8.1cm 62348.8887 [76:86] 326.17 +/- 1.20 0.52
Ba133_8.1cm_detB Ba-133 356 8.1cm 117591.1412 [352:360] 482.58 +/- 0.10 0.41
Cs137_3.9cm_detB Cs-137 661 3.9cm 26079.7 [658:666] 182.33 +/- 0.05 0.70
Cs137_4.1cm_detB Cs-137 661 4.1cm 26079.7 [658:666] 175.26 +/- 0.04 0.67
Cs137_7.9cm_detB Cs-137 661 7.9cm 26079.7 [658:666] 64.28 +/- 0.04 0.25
Cs137_8.1cm_detB Cs-137 661 8.1cm 26079.7 [658:666] 65.14 +/- 0.04 0.25
Mn54_3.9cm_detB Mn-54 834 3.9cm 8986.976 [830:838] 54.75 +/- 0.02 0.61
Mn54_4.1cm_detB Mn-54 834 4.1cm 8986.976 [830:838] 52.55 +/- 0.02 0.58
Mn54_7.9cm_detB Mn-54 834 7.9cm 8986.976 [830:838] 18.62 +/- 0.02 0.21
Mn54_8.1cm_detB Mn-54 834 8.1cm 8986.976 [830:838] 17.98 +/- 0.01 0.20
Na22_3.9cm_detB Na-22 511 3.9cm 7541.784 [504:516] 81.74 +/- 0.09 1.08
Na22_3.9cm_detB Na-22 1274 3.9cm 4215.35 [1270:1280] 24.18 +/- 0 0.57
Na22_4.1cm_detB Na-22 511 4.1cm 7541.784 [504:516] 74.71 +/- 0.09 0.99
Na22_4.1cm_detB Na-22 1274 4.1cm 4215.35 [1270:1280] 22.90 +/- 0 0.54
Na22_7.9cm_detB Na-22 511 7.9cm 7541.784 [504:516] 25.55 +/- 0.05 0.34
Na22_7.9cm_detB Na-22 1274 7.9cm 4215.35 [1270:1280] 7.70 +/- 0 0.18
Na22_8.1cm_detB Na-22 511 8.1cm 7541.784 [504:516] 24.88 +/- 0.06 0.33
Na22_8.1cm_detB Na-22 1274 8.1cm 4215.35 [1270:1280] 7.11 +/- 0 0.17