论文标题
黑体辐射引起的光解离并在h $ _2^+$中对弱绑定状态的种群重新分布
Black-body radiation induced photodissociation and population redistribution of weakly bound states in H$_2^+$
论文作者
论文摘要
接近第一个解离阈值的弱结合状态中的分子氢离子是有吸引力的量子传感器，用于测量质子与电子质量比和高蛋白诱导的正para混合。通过使用最新的离子陷阱设置，可以提高依赖快速束的光谱研究的实验精度。随着电偶极力矩在H $ _2^+$中消失并防止快速自发排放，发现了几周的辐射寿命。我们包括黑体辐射的效果，该辐射可以导致光解离并重新分布，从而获得有效的寿命。使用绝热核波函数和非绝热能量（包括相对论和辐射校正）计算结合结合和边界 - 限制过程的速率系数。通过求解速率方程模型和寿命为4至523〜ms的寿命和$> $> $> $ 215〜MS的有效寿命，分别在室温和液态氮温度下找到。黑体诱导的光解共聚是确定的寿命限制效应，可确保状态选择产生的分子离子集合的纯度。发现纯精细诱导的$ g/u $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $。
Molecular hydrogen ions in weakly bound states close to the first dissociation threshold are attractive quantum sensors for measuring the proton-to-electron mass ratio and hyperfine-induced ortho-para mixing. The experimental accuracy of previous spectroscopic studies relying on fast ion beams could be improved by using state-of-the-art ion trap setups. With the electric dipole moment vanishing in H$_2^+$ and preventing fast spontaneous emission, radiative lifetimes of the order of weeks are found. We include the effect of black-body radiation that can lead to photodissociation and rovibronic state redistribution to obtain effective lifetimes for trapped ion experiments. Rate coefficients for bound-bound and bound-continuum processes were calculated using adiabatic nuclear wave functions and nonadiabatic energies, including relativistic and radiative corrections. Effective lifetimes for the weakly bound states were obtained by solving a rate equation model and lifetimes in the range of 4 to 523~ms and $>$215~ms were found at room temperature and liquid nitrogen temperature, respectively. Black-body induced photodissociation was identified as the lifetime-limiting effect, which guarantees the purity of state-selectively generated molecular ion ensembles. The role of hyperfine-induced $g/u$-mixing, which allows pure rovibrational transitions, was found to be negligible.
