2016/08/31 by J. Liu, Jing Liu, M. Yamashita +3
Physics and Astronomy · #Crystal (programming language) #Dark Matter and Cosmic Phenomena #Dark current #Neutrino Physics Research #Photomultiplier #Radiation Detection and Scintillator Technologies #Scattering #Tube (container) #Yield (engineering) #hep-ex #nucl-ex #physics.ins-det
paper · pdf · doi:10.1088/1748-0221/11/10/p10003
published as Journal of Instrumentation, Volume 11, P10003, October 2016 · 17 pages, 13 figures, published in JINST
openalex created_date 2016/09/16 · openalex publication_date 2016/10/04 · arxiv created 2016/10/05 · arxiv updated 2016/10/06 · openalex updated_date 2026/08/06
A light yield of 20.4 ± 0.8 photoelectrons/keV was achieved with an undoped CsI crystal coupled directly to a photomultiplier tube at 77 Kelvin. This is by far the largest yield in the world achieved with CsI crystals. An energy threshold that is several times lower than the current dark matter experiments utilizing CsI(Tl) crystals may be achievable using this technique. Together with novel CsI crystal purification methods, the technique may be used to improve the sensitivities of dark matter and coherent elastic neutrino-nucleus scattering experiments. Also measured were the scintillation light decay constants of the undoped CsI crystal at both room temperature and 77 Kelvin. The results are consistent with those in the literature.