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Energy Dependence of the y-absorption Coefficient with MCA
Principle: The intensity of γ-radiation decreases when it passes through solid matter. The attenuation can be the result of Compton scattering, the photo effect or the pair production. An absorption coefficient can be attributed to each of the three phenomena. These absorption coefficients, as well as the total absorption, are highly energy-dependent. The energy dependence of the total absorption coefficient for aluminium in the range below 1.3 MeV is verified.
Tasks:
1. For each of the emitting isotopes Na22, Cs137 and Am241 the γ-spectrum is traced and a treshold energy, Ethres, just below the photo-peak in the high energy range determined.
2. Using the scintillation counter in conjunction with the pulse height analyser as a monochromator, the γ-intensity is measured as a function of the thickness of different aluminium layers. The three γ- emitting isotopes are used successively as the source, assuming that the energy of the emitted γ-radiation is known.
| Artikel-Nr. | Artikelbezeichnung |
|---|---|
| P2524215 | Energy dependence of the Gamma-absorption coefficient with MCA |
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