LEVEL 3 LABORATORY
High Energy Physics
High Energy Electron SpectroscopyObjectives of the Project
- Determine the spectral energy distribution of beta radiation from a Sr/Y-90 source.
- Measure the spectrum at a variety of magnetic field settings.
- Investigate the absorption of beta particle energy by various metals.
- Beta radiation spectrometer box and vacuum system.
- Magnet, voltage controllable power supply and Hall probe.
- High voltage supplies.
- Solid state radiation detector.
- Determine the characteristics of the solid state detector with the beta source directly beneath the detector. Observe the effect of air pressure in the vacuum chamber on the beta spectrum.
- Calibrate the magnetic field against the energising current using the Hall probes.
- Do a rapid experiment to determine the optimum measurement time for each data point; at what fields do you need the most precise measurement?
- Use your magnetic field results to calibrate the solid state detector’s energy scale.
- Investigate the change in the energy spectrum when metal targets are placed between the beta particle beam and the solid state detector.
Safety and Precautions
The Sr/Y-90 source used this project has a relatively high activity and therefore should only be handled using appropriate tweezers.
- Siegbahn, K.: Alpha, Beta and Gamma Spectroscopy.
- Evans, R.D.: The Atomic Nucleus.
- Leo, W.R.: Techniques for Nuclear and Particle Physics Experiments
- Useful statistics
- beta decay and the neutrino how beta spectroscopy can be used to better understand the weak interaction.