Gamma ray spectroscopy using a scintillator detector

Type :

Presentation

Pages :

6 pages

Format :

.doc

Published date :

01/19/2009

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Summary :

 
 

Table of Contents Gamma ray spectroscopy using a scintillator detector Table of Contents

 
  1. Introduction.
  2. Experimental details.
    1. The spectra.
    2. The background.
  3. Results.
    1. The spectra.
    2. The energy resolution.
    3. The absolute activity.
  4. Discussion.
    1. The Spectra.
    2. The resolution.
    3. The absolute activity.
    4. Error on the activity.
  5. Conclusion.
  6. References.

Abstract

The aim of the experiment is to learn about the basic techniques of gamma ray energy spectroscopy and the interpretation of a spectrum, using a NaI(TI) detector. We obtained the spectra of two gamma sources using a spectrometer and the Maestro program. We also computed the energy resolution of the spectrometer and the absolute activity of a gamma emitter using different methods. Radioactive nuclei decay into other particles: α-decay, β-decay, and γ-decay, where α particles are 4He nuclei, β particles are electrons or positrons, and γ particles are photons. Here we will study γ-rays decay. It occurs when the nucleus is too high in energy, so it goes to a lower energy state and emits a gamma particle, that is to say a photon. The number of protons and neutrons stay the same, on the other hand α and β decay. γ rays can easily penetrate most materials, that's why they are so dangerous to manipulate. However, they can easily be emitted from the source and be detected.

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