冷囚禁近阈值的光致离解光谱学

Photodetachment spectroscopy of cold trapped near threshold.

机构信息

Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria.

出版信息

J Chem Phys. 2018 Sep 14;149(10):104302. doi: 10.1063/1.5042621.

PMID:30219014

Abstract

We have studied photodetachment of the amidogen anion as a function of photon energy near the detachment threshold. The detachment spectrum is obtained over the energy range of 6190-6355 cm from the loss rate of the anions from a cryogenic radiofrequency multipole ion trap. By modeling all accessible rotational state-to-state photodetachment transitions, we can assign rotational state-specific thresholds to the measured spectrum. In this way, we have determined the electron affinity of NH to be 6224 ± 1 cm.

摘要

我们研究了在离解阈附近，作为光子能量函数的氨基阴离子的光离解。通过从低温射频多极离子阱中损失阴离子的速率，在 6190-6355cm 的能量范围内获得离解光谱。通过对所有可及的转动态到态光离解跃迁进行建模，我们可以将特定于转动的阈值分配给测量的光谱。通过这种方式，我们确定 NH 的电子亲和能为 6224±1cm。