Difference between revisions of "KJM5911 Lab Exercise 3 - Gamma Spectroscopy"

From mn/safe/nukwik
Jump to: navigation, search
Line 2: Line 2:
  
 
=== Learning Goals  ===
 
=== Learning Goals  ===
 
 
  
 
After completing this exercise you should  
 
After completing this exercise you should  
  
*Understand the processes by which gamma radiation is absorbed in the detector.
+
*Understand the processes by which gamma radiation is absorbed in the detector.  
*Understand how the detector (and it's electronics) transform the absorbed energy from the gamma rays into electrical pulses which is continously sorted according to pulse height and presented as a histogram (number of events vs energy) - a "spectrum".
+
*Understand how the detector (and it's electronics) transform the absorbed energy from the gamma rays into electrical pulses which is continously sorted according to pulse height and presented as a histogram (number of events vs energy) - a "spectrum".  
*Know the basic parameters of a spectroscopy system (spectrum, real time, life time, dead time, channels, etc.).
+
*Know the basic parameters of a spectroscopy system (spectrum, real time, life time, dead time, channels, etc.).  
*Know the relationship between channel number and energy, how to derive this relationship ("energy calibration") and be able to evaluate it's uncertainty.
+
*Know the relationship between channel number and energy, how to derive this relationship ("energy calibration") and be able to evaluate it's uncertainty.  
*Recognice the different parts of a gamm-ray spectrum.
+
*Recognice the different parts of a gamm-ray spectrum.  
 
*Know how "peaks" in the spectrum are analysed and understand the results (you should understand terms like: ROI, gross count, net count, peak fitting, FWHM, etc.). You should understand how the software calculate and subtract the background under the peaks.  
 
*Know how "peaks" in the spectrum are analysed and understand the results (you should understand terms like: ROI, gross count, net count, peak fitting, FWHM, etc.). You should understand how the software calculate and subtract the background under the peaks.  
 
*Know the relationship between number of counts and gamma-rays emitted by the source (and the disintegration rate).
 
*Know the relationship between number of counts and gamma-rays emitted by the source (and the disintegration rate).
 +
 +
After completing this exercise you should:
 +
 +
*Understand the processes by which gamma radiation is absorbed in the detector.
 +
*Understand how the detector (and it's electronics) transform the absorbed energy from the gamma rays into electrical pulses which is continuously sorted according to pulse height and presented as a histogram (number of events vs. energy) - a "spectrum".
 +
*Know the basic parameters of a spectroscopy system (spectrum, real time, life time, dead time, channels, etc.).
 +
*Know the relationship between channel number and energy, how to derive this relationship ("energy calibration") and be able to evaluate it's uncertainty.
 +
*Recognise the different parts of a gamma-ray spectrum.
 +
*Know how "peaks" in the spectrum are analysed and understand the results (you should understand terms like: ROI, gross count, net count, peak fitting, FWHM, etc.). You should understand how the software calculate and subtract the background under the peaks.
 +
*Know the relationship between number of counts and gamma-rays emitted by the source (and the disintegration rate). I.e. how to perform an efficiency calibration.
  
 
=== Theory  ===
 
=== Theory  ===

Revision as of 14:16, 14 October 2012

UnderConstruction pict22.gifUnderConstruction pict17.gifWarning - under construction - you are welcome to read it, but it will change...

Learning Goals

After completing this exercise you should

  • Understand the processes by which gamma radiation is absorbed in the detector.
  • Understand how the detector (and it's electronics) transform the absorbed energy from the gamma rays into electrical pulses which is continously sorted according to pulse height and presented as a histogram (number of events vs energy) - a "spectrum".
  • Know the basic parameters of a spectroscopy system (spectrum, real time, life time, dead time, channels, etc.).
  • Know the relationship between channel number and energy, how to derive this relationship ("energy calibration") and be able to evaluate it's uncertainty.
  • Recognice the different parts of a gamm-ray spectrum.
  • Know how "peaks" in the spectrum are analysed and understand the results (you should understand terms like: ROI, gross count, net count, peak fitting, FWHM, etc.). You should understand how the software calculate and subtract the background under the peaks.
  • Know the relationship between number of counts and gamma-rays emitted by the source (and the disintegration rate).

After completing this exercise you should:

  • Understand the processes by which gamma radiation is absorbed in the detector.
  • Understand how the detector (and it's electronics) transform the absorbed energy from the gamma rays into electrical pulses which is continuously sorted according to pulse height and presented as a histogram (number of events vs. energy) - a "spectrum".
  • Know the basic parameters of a spectroscopy system (spectrum, real time, life time, dead time, channels, etc.).
  • Know the relationship between channel number and energy, how to derive this relationship ("energy calibration") and be able to evaluate it's uncertainty.
  • Recognise the different parts of a gamma-ray spectrum.
  • Know how "peaks" in the spectrum are analysed and understand the results (you should understand terms like: ROI, gross count, net count, peak fitting, FWHM, etc.). You should understand how the software calculate and subtract the background under the peaks.
  • Know the relationship between number of counts and gamma-rays emitted by the source (and the disintegration rate). I.e. how to perform an efficiency calibration.

Theory

Experimental Procedure

Safety Aspects

Theory