EXO-200 results and cosmogenic backgrounds

International Conference on Particle Physics and Astrophysics

物理学;天文学

Belov, V.A.^1

SSC RF ITEP of NRC kI, B. Cheremushkinskaya 25, Moscow

117218, Russia^1

关键词: Background rejection capability;    Double beta decay;    Energy resolutions;    Front end electronics;    Liquid xenon;    Low background;    Lower limits;    Status updates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012102/pdf
DOI  :  10.1088/1742-6596/798/1/012102

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Status update and recent results from the double beta decay search experiment EXO-200 are presented. Detector is a liquid xenon TPC with charge and light readout located underground in low-background laboratory at 1600 m.w.e. depth. It contains 175 kg of xenon with 80.6% abundance of136Xe, which acts as both the decaying nucleus and detection medium. Detector showed good performance and achieved remarkable results. The detector has demonstrated excellent energy resolution and background rejection capabilities and has set a lower limit on the 0νββ-decay half-life of 1.1 × 1025years at 90% C.L. in early 2014. The EXO-200 collaboration has since published several papers on experimental backgrounds and searches for rare or exotic processes. After a two-year data interruption, EXO-200 is now back online with significant hardware improvements, including a radon reduction air system and a front end electronics upgrade for better energy resolution.