Identification of light particles by means of pulse shape analysis with silicon detector at low energy

摘要

Particle separation of ~(1,2,3)H at energy of 3 MeV has been achieved by digital pule shape analysis (DPSA) for particles fully stopped in a 500 urn silicon detector. Light charged particles were produced in a nuclear reaction induced by a 34 MeV beam of ~7Li impinging on a ~(12)C target. Proton-deuterium identification has also been observed at 2 MeV using mono-energetic beams. A 20 keV resolution neutron transmutation doped (NTD) silicon detector was employed in a low-field injection setup. The method uses the parameters obtained both from the charge and current pulses generated by a high bandwidth charge sensitive preamplifier. The simplicity of the electronic chain plus the experimental conditions allowed the team to work with very low noise achieving signal-to-noise ratio (SNR) at values greater than 10.