Nuclear recoil scintillation and ionisation yields in liquid xenon from ZEPLIN-III data
Nuclear recoil scintillation and ionisation yields in liquid xenon from ZEPLIN-III data
复制标题
DOI：
10.1016/j.physletb.2011.10.038
复制
发表时间：
2011-06
影响因子：
4.4
通讯作者：
M. Horn;V. Belov;D. Akimov;H. Araujo;E. Barnes;A. Burenkov;V. Chepel;A. Currie;B. Edwards;C. Ghag;A. Hollingsworth;G. Kalmus;A. Kobyakin;A. Kovalenko;V. Lebedenko;A. Lindote;A. Lindote;M. Lopes;R. Lüscher;P. Majewski;A. Murphy;F. Neves;F. Neves;S. Paling;J. G. D. Cunha;R. Preece;J. Quenby;L. Reichhart;P. Scovell;Catarina Silva;V. Solovov;N. Smith;P. Smith;V. Stekhanov;T. Sumner;C. Thorne;L. D. Viveiros;R. Walker
中科院分区：
文献类型：
--
作者：
M. Horn;V. Belov;D. Akimov;H. Araujo;E. Barnes;A. Burenkov;V. Chepel;A. Currie;B. Edwards;C. Ghag;A. Hollingsworth;G. Kalmus;A. Kobyakin;A. Kovalenko;V. Lebedenko;A. Lindote;A. Lindote;M. Lopes;R. Lüscher;P. Majewski;A. Murphy;F. Neves;F. Neves;S. Paling;J. G. D. Cunha;R. Preece;J. Quenby;L. Reichhart;P. Scovell;Catarina Silva;V. Solovov;N. Smith;P. Smith;V. Stekhanov;T. Sumner;C. Thorne;L. D. Viveiros;R. Walker
利用宽带Am-Be中子源获得的数据，计算了10keVnr(核反冲能)以上的液体氙气中核反冲的闪烁和电离产额。核反冲数据来自两个源的几次暴露，并与详细的模拟进行了比较。得出了与能量有关的闪烁和电离产额，对数据进行了可接受的拟合。使用光收集蒙特卡罗、测量的光电倍增管响应曲线和硬件触发研究来处理效率和分辨率效应。Vnris发现闪烁产额逐渐下降到∼40keVnris以下，同时电离产额上升；两者都与最新的独立测量结果一致。这种分析方法适用于ZEPLIN-III的最新数据，这些数据是用大幅升级的探测器和经过精确校准的Am-Be源获得的，以及2008年第一次运行时的较早数据。文中还给出了包括亚阈值S_1事件在内的反冲闪烁产额的一种新的推导方法，证实了主要分析结果。
Scintillation and ionisation yields for nuclear recoils in liquid xenon above 10 keVnr(nuclear recoil energy) are deduced from data acquired using broadband Am–Be neutron sources. The nuclear recoil data from several exposures to two sources were compared to detailed simulations. Energy-dependent scintillation and ionisation yields giving acceptable fits to the data were derived. Efficiency and resolution effects are treated using a light collection Monte Carlo, measured photomultiplier response profiles and hardware trigger studies. A gradual fall in scintillation yield below ∼40 keVnris found, together with a rising ionisation yield; both are in agreement with the latest independent measurements. The analysis method is applied to the most recent ZEPLIN-III data, acquired with a significantly upgraded detector and a precision-calibrated Am–Be source, as well as to the earlier data from the first run in 2008. A new method for deriving the recoil scintillation yield, which includes sub-threshold S1 events, is also presented which confirms the main analysis.