View source for LB Feb 2017 Geometric Efficiency Calculations

Below are the theoretical calculations for the theoretical decay frequencies

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


:= <math>\left (1.788 \right )\left ( 1.196 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)=  79122.6 Hz </math> for the 511 line




Below is a table where the actual efficiency will be calculated for position R (farthest position).

 {| border="3"  cellpadding="5" cellspacing="0"
|  Run || Source || Energy (keV) || Expected Rate (Hz) || HpGe Rate (Hz) || HpGe Det D Efficiency (%)   
|-
| r5825  || Na-22 || 511 || 79122.6 || (480:540) (4.309-0.065=4.244) || 0.005 
|-
| r5826 || Na-22 || 511 || 28091.2 ||(480:540)(1.105-0.02281=1.0821) ||0.004 
|-
| r5827 || Na-22 || 511  || 861.1 ||(480:540)(0.04037-0.009123=0.031247)||0.004
|- 
| r5829 || Na-22 ||  511 || 137692 ||(480:540)(3.686-0.01939=3.67)||0.003 
|-
| r5830 || Na-22 || 511 || 44224 ||(480:540) (1.073-0.0057=1.0673)||0.002 
|-
| r5831 || Na-22 ||  511 || 139058.52 ||(480:540)(3.283-0.05702=3.22598)|| 0.002
|}