丙烯酸（PMMA）和聚四氟乙烯（PTFE）对紫外光的光致发光响应
Photoluminescence response of acrylic (PMMA) and polytetrafluoroethylene (PTFE) to ultraviolet light
摘要：
一些出版物表明，当用紫外线（UV）至可见光范围内的光子照射时，聚（甲基丙烯酸甲酯）（PMMA）和聚四氟乙烯（PTFE）表现出低水平的光致发光（荧光和/或磷光）。PMMA（也称为丙烯酸）和PTFE通常用于在稀有事件搜索实验中包含液体氩（LAr）或氙（LXe）靶材料。在真空紫外区，LAr和Leptin发光，并且PMMA和PTFE可以被这些光子直接照射。来自支撑材料的光致发光可能在这些检测器中引起意外的信号。我们调查的光致发光在400 nm至550 nm的区域，在130 nm和250 nm之间的相关水平的稀有事件搜索实验的紫外光激发。测量在室温下进行，信号强度在几分钟内进行时间积分。我们测试了来自DEAP-3600和LUX实验中使用的批次的PMMA和PTFE样品，并且没有观察到光致发光信号。我们将塑料将UV光子转移到400 nm至550 nm波长区域的效率限制在相对于四苯基丁二烯的波长转移效率的0.05%至0.35%。
英文摘要：
Some publications indicate that poly(methyl methacrylate) (PMMA) and polytetrafluoroethylene (PTFE) exhibit low levels of photoluminesence (fluorescence and/or phosphorescence) when irradiated with photons in the ultraviolet (UV) to visible range. PMMA (also known as acrylic) and PTFE are commonly used to contain the liquid argon (LAr) or xenon (LXe) target material in rare-event search experiments. LAr and LXe scintillate in the vacuum UV region, and the PMMA and PTFE can be directly illuminated by these photons. Photoluminescence from support materials could cause unexpected signals in these detectors. We investigate photoluminesence in the 400 nm to 550 nm region in response to excitation with UV light between 130 nm and 250 nm at levels relevant to rare-event search experiments. Measurements are done at room temperature and the signal intensity is time-integrated over several minutes. We tested PMMA and PTFE samples from the batches used in the DEAP-3600 and LUX experiments and observed no photoluminescence signal. We put limits on the efficiency of the plastics to shift UV photons to a wavelengths region of 400 nm to 550 nm at 0.05% to 0.35% relative to the wavelength shifting efficiency of tetraphenyl-butadiene.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
