Pulse-shape discrimination with Cs2HfCl6 crystal scintillator

作者：Cardenas C^*; Burger A; Goodwin B; Groza M; Laubenstein M; Nagorny S; Rowe E

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2017, 869: 63-67.

DOI：10.1016/j.nima.2017.06.041

• Cs2HfCl6 crystal scintillator
• alpha decay Hf isotopes
• Pulse-shape discrimination
• Quenching factor

The results of investigation into cesium hafnium chloride (Cs2HfCl6) scintillating crystals as a promising detector to search for rare nuclear processes occurring in Hf isotopes is reported. The light output, quenching factor, and pulse-shape characteristics have been investigated at room temperature. The scintillation response of the crystal induced by alpha-particles and gamma-quanta were studied to determine possibility of particle discrimination. Using the optimal filter method we obtained clear separation between signals with a factor of merit (FOM) = 9.3. This indicates that we are able to fully separate signals originating from alpha-particles and gamma-quanta. Similar fruitful discrimination power was obtained by applying the mean time method (FOM = 7) and charge integration method (FOM = 7.5). The quenching factor for collimated 4 MeV alpha-particles is found to be 0.36, showing that alpha-particles generate more than a third of the light compared to gamma-quanta at the same energy.

• 出版日期2017-10-11