Pulse-shape discrimination with PbWO${}_4$ crystal scintillators

Abstract

The light output, $\hat{I}\pm /{\hat{I}}^2$ ratio, and pulse shape have been investigated at $-25^{\circ }$ C with PbWO${}_4$ crystal scintillators undoped, and doped by F, Eu, Mo, Gd and S. The fast $0.01-0.06\hat{I}¼$s and middle $0.1-0.5\hat{I}¼$s components of scintillation decay were observed for all the samples. Slow components of scintillation signal with the decay times $1-3\hat{I}¼$s and $13-28\hat{I}¼$s with the total intensity up to $\approx 50$ have been recognized for several samples doped by Molybdenum. We found some indications of a pulse-shape discrimination between $\hat{I}\pm$ particles and ${\hat{I}}^3$ quanta with PbWO${}_4$ (Mo doped) crystal scintillators.

12 pages, 5 figures, submitted to NIM A