固体$^{4}$ He中Rb $_{2}$二聚体的光谱
Spectroscopy of Rb$_{2}$ dimers in solid $^{4}$He
摘要：
本文对Rb $_{2}$分子在固态氦中的吸收、发射和光离解光谱进行了实验和理论研究。我们确定了Rb $_{2}$的11个吸收带。所有的激光激发的分子态通过与He基质的相互作用而猝灭。猝灭导致亚稳态（1）$^{3}Π_{u}$态的有效布居，其在1042 nm处发射荧光。为了解释禁戒跃迁的荧光及其时间依赖性，我们提出了一种新的分子激基复合物Rb $_{2}(^{3}Π_{u})$ He $_{2}$。我们还发现了Rb $_{2}$光解后形成双原子泡态的证据。
英文摘要：
We present experimental and theoretical studies of the absorption, emission and photodissociation spectra of Rb$_{2}$ molecules in solid helium. We have identified 11 absorption bands of Rb$_{2}$. All laser-excited molecular states are quenched by the interaction with the He matrix. The quenching results in efficient population of a metastable (1)$^{3}Π_{u}$ state, which emits fluorescence at 1042 nm. In order to explain the fluorescence at the forbidden transition and its time dependence we propose a new molecular exciplex Rb$_{2}(^{3}Π_{u})$He$_{2}$. We have also found evidence for the formation of diatomic bubble states following photodissociation of Rb$_{2}$.
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