标题： NEXT实验：用于无中微子双β衰变搜索的高压氙气TPC 显示英文标题

标题： The NEXT experiment: A high pressure xenon gas TPC for neutrinoless double beta decay searches

摘要： 无中微子双β衰变是一种假设的、非常缓慢的核转变过程，在此过程中两个中子同时发生β衰变且不发射中微子。 这一过程的重要性不仅在于其本身的兴趣：明确的观测将确立中微子的马约拉纳性质并证明轻子数的破坏。 NEXT是一项新的实验，使用放射纯的高压氙气气体TPC来寻找无中微子双β衰变，其中填充了100公斤富集Xe-136的Xe。 NEXT将是第一个使用电致发光读出技术的大型高压气体TPC，该技术采用SOFT（分离、优化功能）技术。 设计包括一个不对称的TPC，光电倍增管位于透明阴极后面，位置敏感的光像素位于阳极后面。 该实验已批准于2014年在西班牙坎弗兰克地下实验室（LSC）开始数据采集。 显示英文摘要

摘要： Neutrinoless double beta decay is a hypothetical, very slow nuclear transition in which two neutrons undergo beta decay simultaneously and without the emission of neutrinos. The importance of this process goes beyond its intrinsic interest: an unambiguous observation would establish a Majorana nature for the neutrino and prove the violation of lepton number. NEXT is a new experiment to search for neutrinoless double beta decay using a radiopure high-pressure xenon gas TPC, filled with 100 kg of Xe enriched in Xe-136. NEXT will be the first large high-pressure gas TPC to use electroluminescence readout with SOFT (Separated, Optimized FuncTions) technology. The design consists in asymmetric TPC, with photomultipliers behind a transparent cathode and position-sensitive light pixels behind the anode. The experiment is approved to start data taking at the Laboratorio Subterr\'aneo de Canfranc (LSC), Spain, in 2014.