论文标题
测量液体氙的闪烁分辨率及其对未来分割量热计的影响
Measurement of the scintillation resolution in liquid xenon and its impact for future segmented calorimeters
论文作者
论文摘要
我们报告了仅记录闪烁光时可以在液体氙气中获得的能量分辨率的新测量。我们的设置被优化以最大程度地收集光，并使用最先进的，高PDE，对VUV敏感的硅光电塑料。我们发现511 KEV时的值为4.2％ +-0.2％FWHM，结果比以前的测量值要好得多，并且接近我们在设置中期望的Poissonian分辨率（5.4％ +-0.8％FWHM在511 KEV时）。我们的结果与液体氙的固有能量分辨率的无效值兼容，在511 keV时为95％Cl时的上限为0.4％FWHM，与过去二十年中一直站立的理论估计相同的区域中的3--4％FWHM进行比较。我们的工作为基于液体氙气的设备开辟了新的可能性，并且仅使用闪烁。特别是，它表明，使用液体氙气模块化闪烁检测器可能非常有竞争力，因为分段量热量表中的构件具有应用于核和粒子物理以及正电子发射断层扫描技术。
We report on a new measurement of the energy resolution that can be attained in liquid xenon when recording only the scintillation light. Our setup is optimised to maximise light collection, and uses state-of-the-art, high-PDE, VUV-sensitive silicon photomultipliers. We find a value of 4.2% +- 0.2% FWHM at 511 keV, a result much better than previous measurements and close to the Poissonian resolution that we expect in our setup (5.4% +- 0.8% FWHM at 511 keV). Our results are compatible with a null value of the intrinsic energy resolution in liquid xenon, with an upper bound of 0.4% FWHM at 95% CL at 511 keV, to be compared with 3--4% FWHM in the same region found by theoretical estimations which have been standing for the last twenty years. Our work opens new possibilities for apparatus based on liquid xenon and using scintillation only. In particular it suggests that modular scintillation detectors using liquid xenon can be very competitive as building blocks in segmented calorimeters, with applications to nuclear and particle physics as well as Positron Emission Tomography technology.
