Difference between revisions of "LB May 2017 Det A Efficiency"

From New IAC Wiki
Jump to navigation Jump to search
Line 10: Line 10:
 
:= <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 (0.1834 \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
  
−
Now compute the expected rate for February 5, 2017.
 
  
−
The activity on Feb 5, 2017 is 3.944 uCi, so the expected rates for the 2 lines are
+
:= <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
−
 
 
−
:= <math>\left (0.99937 \right )\left ( 3.944 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)= 145,836 Hz </math> for the 1274 keV line
 
−
 
 
−
:= <math>\left (1.788 \right )\left ( 3.944 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)=  260919.264 Hz </math> for the 511 keV line
 
−
 
 
−
Now compute the expected rate for February 9, 2017
 
−
 
 
−
The activity on Feb 9, 2017 is 3.933 uCi, so the expected rate for the 2 lines are
 
−
 
 
−
 
 
−
:= <math>\left (0.99937 \right )\left ( 3.933 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)= 145,429.32 Hz </math> for the 1274 keV line
 
−
 
 
−
:= <math>\left (1.788 \right )\left ( 3.933 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)=  260,191.55 Hz </math> for the 511 keV line
 
−
 
 
−
Now compute the expected rate for Feb 12, 2017
 
−
 
 
−
The activity on Feb 12, 2017 is 3.924 uCi, so the expected rate for the 2 lines are
 
−
 
 
−
:= <math>\left (0.99937 \right )\left ( 3.924 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)= 145096.5316 Hz </math> for the 1274 keV line
 
−
 
 
−
:= <math>\left (1.788 \right )\left ( 3.924 \times 10^{-6} \mbox{Ci} \right) \left (\frac{ (3.7 \times 10^{10} \mbox{Hz}}{\mbox{Ci}} \right)=  259596.144 Hz </math> for the 511 keV line
 
  
 
=Actual Efficiency=
 
=Actual Efficiency=

Revision as of 22:12, 22 August 2017

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

Run Source Energy (keV) Position Expected Rate (Hz) ROOT Window HpGe Rate (Hz) HpGe Detector A Efficiency (%)
Retrieved from "https://wiki.iac.isu.edu/index.php?title=LB_May_2017_Det_A_Efficiency&oldid=117812"