Development of a Doppler broadening positron spectroscopy setup and relative positron-electron momentum distribution measurement for commercial Al

Development of a Doppler broadening positron spectroscopy setup is reported. The setup consists of an HPGe detector with energy resolution of 2.1 keV at 411.8 keV in coincidence with a NaI detector. The stability of the electronic devices was extensively studied. Finally, the relative positron-electron momentum distribution for commercial Al was measured. The comparison between our data and other’s data reveals a very good agreement.