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

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=== Learning Goals === | === Learning Goals === | ||

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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 15:16, 14 October 2012

Warning - 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

- Introduction to Gamma Radiation
- Gamma Spectroscopy and Detectors
- The Theory behind Calibration of a Gamma Detector

### Experimental Procedure

### Safety Aspects

**Theory**

- Student Guide - Efficieny Calibration Curve
- Student Guide - Determination of Unknown Sample
- Student Guide - Summary of Gamma Spectroscopy Analysis