Gamma ray spectroscopy using a scintillator detector
Summary :
Table of Contents
- Introduction.
- Experimental details.
- The spectra.
- The background.
- Results.
- The spectra.
- The energy resolution.
- The absolute activity.
- Discussion.
- The Spectra.
- The resolution.
- The absolute activity.
- Error on the activity.
- Conclusion.
- 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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