Scintillation at cryogenic temperatures can give rise to detectors with particle discrimination for rare-event searches such as dark matter detection. We present time-resolved scintillation studies of Caesium Iodide (CsI) under excitation of both alpha and gamma particles over a long acquisition window of 1 ms to fully capture the scintillation decay between room temperature and 4 K. This allows a measurement of the light yield independent of any shaping time of the pulse. We find the light yield of CsI to increase up to two orders of magnitude from that of room temperature at cryogenic temperatures, and the quenching factor of alpha to gamma excitation to exceed 1 over a range of temperatures between 10 and 100 K. We also find the time structure of the emitted light to follow similar exponential decay time constants between alpha and gamma excitation, with the temperature behaviour consistent with a model of self-trapped exciton de-excitation.
Scintillation characteristics of an undoped CsI crystal at low-temperature for dark matter search
University of Science and Technology (UST)（韩国科学技术院）；Institute for Basic Science (IBS)（基础科学研究院）；Jeju National University（济州国立大学）；Kyungpook National University（庆北国立大学）
CRYSP: a Total-Body PET based on cryogenic cesium iodide crystals
Donostia International Physics Center（多诺斯蒂亚国际物理中心）；Ikerbasque (Basque Foundation for Science)（伊克拉巴斯基（巴斯克科学基金会））；Instituto de Instrumentación para Imagen Molecular (I3M), Centro Mixto CSIC - Universitat Politècnica de València（分子成像仪器研究所（I3M），CSIC-瓦伦西亚理工大学联合中心）；Universidad del País Vasco (UPV/EHU)（巴斯克大学）；Instituto de Física Corpuscular (IFIC), CSIC & Universitat de València（粒子物理研究所（IFIC），CSIC与瓦伦西亚大学）
Characterization and Optimization of a Cryogenic Pure CsI Detector with Remarkable Light Yield and Unprecedented Energy Resolution for CLOVERS Experiment
Scintillation response of cryogenic CsI to few-keV and sub-keV nuclear recoils
University of Chicago（芝加哥大学）；Donostia International Physics Center (DIPC)（多诺西亚国际物理中心）；Ikerbasque, Basque Foundation for Science（伊克尔巴斯基克，巴斯克科学基金会）；Instituto de Física Corpuscular, CSIC & Universitat de València（粒子物理研究所，西班牙国家科学研究委员会与瓦伦西亚大学）
Quality Assurance on Un-Doped CsI Crystals for the Mu2e Experiment
Mu 2 e实验正在建造一个由1，348个未掺杂的CsI晶体组成的量热计。每个晶体的尺寸为34 x 34 x 200 mm，并由大面积硅PMT阵列读出。根据物理要求制定了一系列技术指标。生产前的碘化铯晶体从三家公司采购：Amcrys，圣戈班和上海陶瓷研究所。本文报道了晶体闪烁性能的质量保证及其对电离剂量和中子的抗辐射能力。具有30 ns的快速衰减时间和超过100 p.e./ MeV测量的双碱PMT，未掺杂的CsI晶体提供了一个具有成本效益的解决方案的Mu 2 e实验。
