一种从液体样品中操作和鉴定单个钡离子的装置
An apparatus to manipulate and identify individual Ba ions from bulk liquid Xe
摘要：
我们描述了一个系统来传输和识别液体氙中产生的钡离子，作为双β衰变实验nEXO第二阶段研发的一部分。目标是确定由同位素$^{136}$的极其罕见的核衰变产生的Ba离子，从而提供衰变发生的确认。这是通过共振电离光谱（RIS）实现的。在这里描述的测试设置中，Ba离子可以在液体氙或真空中产生，并收集在干净的基板上。然后将该基底移到真空下的分析室中，其中激光诱导热解吸和RIS与飞行时间（TOF）质谱一起用于钡衰变产物的阳性鉴定。
英文摘要：
We describe a system to transport and identify barium ions produced in liquid xenon, as part of R&D towards the second phase of a double beta decay experiment, nEXO. The goal is to identify the Ba ion resulting from an extremely rare nuclear decay of the isotope $^{136}$Xe, hence providing a confirmation of the occurrence of the decay. This is achieved through Resonance Ionization Spectroscopy (RIS). In the test setup described here, Ba ions can be produced in liquid xenon or vacuum and collected on a clean substrate. This substrate is then removed to an analysis chamber under vacuum, where laser-induced thermal desorption and RIS are used with time-of-flight (TOF) mass spectroscopy for positive identification of the barium decay product.
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