X-ray detection capability of a Cs2ZnCl4 single-crystal scintillator

• DOI: 10.7567/apex.7.062602
• Publication Date: 2014-05-27T09:37:04Z
• Authors: Natsuna Yahaba; Masanori Koshimizu; Yan Sun; Takayuki Yanagida; Yutaka Fujimoto; Rie Haruki; Fumihiko Nishikido; Shunji Kishimoto; Keisuke Asai
• Keywords: 0103 physical sciences; 7. Clean energy; 01 natural sciences

The X-ray detection capability of a scintillation detector equipped with a Cs2ZnCl4 single crystal was evaluated. The scintillation decay kinetics can be expressed as the sum of two exponential decay components. The fast decay component had a decay time constant of 1.8 ns, and its relative intensity was 95%. The total light output was 630 photons/MeV, and a subnanosecond timing resolution of 0.66 ns was obtained. The detection efficiency of 67.4 keV X-rays was 80% for a detector equipped with a 2.2-mm-thick Cs2ZnCl4 crystal. Thus, excellent timing resolution and high detection efficiency were achieved simultaneously.