Response of CdWO4 crystal scintillator for few MeV ions and low energy electrons

TL;DR

This study investigates the response of CdWO4 crystal scintillators to various ions and electrons in the MeV and keV range, analyzing quenching, non-proportionality, and pulse-shape discrimination capabilities.

Contribution

It provides new measurements of scintillator responses to low-energy ions and electrons, and models their quenching and light yield behaviors.

Findings

Quantified quenching factors for ions in CdWO4.

Analyzed non-proportionality of light yield for low-energy electrons.

Demonstrated pulse-shape discrimination between different radiation types.

Abstract

The response of a CdWO4 crystal scintillator to protons, alpha particles, Li, C, O and Ti ions with energies in the range 1 - 10 MeV was measured. The non-proportionality of CdWO4 for low energy electrons (4 - 110 keV) was studied with the Compton Coincidence Technique. The energy dependence of the quenching factors for ions and the relative light yield for low energy electrons was calculated using a semi-empirical approach. Pulse-shape discrimination ability between gamma quanta, protons, alpha particles and ions was investigated.