Difference between revisions of "LB Feb 2017 Energy Efficiency Calculations"
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| Run || Source || Energy (keV) || Expected Rate (Hz) || HpGe Rate (Hz) || HpGe Det D Efficiency (%) | | Run || Source || Energy (keV) || Expected Rate (Hz) || HpGe Rate (Hz) || HpGe Det D Efficiency (%) | ||
|- | |- | ||
| − | || | + | ||r5818 || Cs-137 || 661.7 || |
|- | |- | ||
|} | |} | ||
Revision as of 04:03, 3 March 2017
Theoretical Activities
Na-22, 9.427micro Ci on July 1, 2008, half life 2.602 +/- 0.002 years, 99.937% for 1274.52 and 178.8 for 511 line , activity in March 31, 2016 =1.196micro Ci
- = for the 1274 line
- = for the 511 line
Cs-137, 661.660 line, 85.21% * 1.066micro Ci on July 1, 2008, half life 30.0 +/- 0.2 yrs, March 31, 2016 activity = 0.891micro Ci expected rate for 661 line
- =
Mn-54, 11.77 microCi on July 1, 2008, half life =312.20 +/- 0.07 days, 99.975% intensity on 834.826 , March 31, 2016 activity =0.02328micro Ci
- = for the 834 line
Co-60, 10.42micro Ci July 1, 2008, half life 5.271 +/- 0.001 years, 99.0 % for 1173.237 and 99.9824 % for 1332.501, March 31, 2016 activity=3.759micro Ci
- = for the 1173 line
- = for the 1332 line
Actual Activites
Cs-137
The line of interest in Cs-137 the 661.7 line.
Using the program BackgroundSubtract.C in /data/IAC/Se/Feb_2017_Efficiency/Energy_Efficiency and the root command
BackgroundSubtract("r5818.root","r5891.root",412,3369);
The 661.7 keV line can be seen
Energy Efficiencies
Below is a table with the calculated efficiencies
| Run | Source | Energy (keV) | Expected Rate (Hz) | HpGe Rate (Hz) | HpGe Det D Efficiency (%) |
| r5818 | Cs-137 | 661.7 |