AI 中文总结
该研究探究高压氙中Ba²⁺的电荷态动力学，发现中性氙辅助的三体复合可将Ba²⁺转为Ba⁺，为NEXT实验的BaTa技术设计提供了关键依据。
AI 中文摘要
钡标记（BaTa）是在高压氙时间探测室中实现近无背景的无中微子双β衰变（0νββ）搜索的最有前景的技术之一。然而，BaTa的实验实施关键取决于核衰变事件中产生的子体Ba²⁺离子的电荷态动力学。在本研究中，我们综述了可能的复合通道并评估了其物理可行性。所得结果表明，尽管双体复合通道受到强烈抑制，但由中性氙原子辅助的三体复合构成了将Ba²⁺转化为Ba⁺的物理上合理的机制，其时间尺度为毫秒级，与NEXT实验中的特征探测时间相当。这些结果表明，钡的电荷态应被视为具有直接影响BaTa技术设计和实验实施的动力学量。
英文摘要
Barium tagging (BaTa) is one of the most promising techniques for achieving a nearly background-free search for neutrinoless double-beta decay ($0νββ$) in high-pressure xenon time detection chambers. However, the experimental implementation of BaTa depends critically on the chage-state dynamics of the daughter Ba$^{2+}$ ion produced in the nuclear decay event. In this work, I review the possible recombination channels and evaluate their physical viability. The obtained results indicate that although binary recombination channels are strongly suppressed, three-body recombination assisted by neutral xenon atoms constitutes a physically plausible mechanism for the conversion of Ba$^{2+}$ into Ba$^+$ on timescales -milliseconds- comparable to the characteristic detection times in the NEXT experiment. These results suggest that the barium charge state should be regarded as a dynamical quantity with direct implications for the design and experimental implementation of BaTa techniques.
