Scintillation decay-time constants for alpha particles and electrons in liquid xenon

Abstract

Understanding liquid xenon scintillation and ionization processes is of great interest to improve analysis methods in current and future detectors. In this paper, we investigate the dynamics of the scintillation process for excitation by $\mathcal{O}$(10 keV) electrons from a ${}^{83m}$Kr source and $\mathcal{O}$(6 MeV) $\alpha$-particles from a ${}^{222}$Rn source, both mixed with the xenon target. The single photon sampling method is used to record photon arrival times in order to obtain the corresponding time distributions for different applied electric fields between about 0.8 V/cm to 1.2 kV/cm. Energy and field dependences of the signals which are observed in the results are discussed.

arXiv comment11 pages, 9 figures; replaced with published manuscript version

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