Abstract

The luminescence excitation spectra of the D₁ resonance line of atoms K, Rb, and Cs in gas mixtures with CF₄ are found to contain satellite transitions, which correspond to the transition of an atom to the states (n – 1)d ²D_3/2,5/2 and (n + 1)s ²S_1/2, where n = 4, 5, and 6 for K, Rb, and Cs, respectively, with the simultaneous excitation of CF₄ molecule vibrations at the IR active mode frequency ν₃ with a quantum energy of 1283 cm^–1. These satellite transitions are A(ns ²S_1/2) + CF₄(ν₃ = 0) + hν → A((n – 1)d ²D_3/2,5/2) + CF₄(ν₃ = 1) and A(ns ²S_1/2) + CF₄(ν₃ = 0) + hν → A((n + 1)s ²S_1/2) + CF₄(ν₃ = 1), where A = K, Rb, and Cs. The appearance of an optical coupling between the upper and lower states of these asymptotically (at \({{R}_{{{\text{A}} - {\text{C}}{{{\text{F}}}_{4}}}}}\) → ∞) forbidden transitions is shown to be caused by the interaction of the dipole moment of the ν₃ = 1 ↔ ν₃ = 0 vibrational transition in the CF₄ molecule with the dipole moments of the electronic transitions np ²P_1/2,3/2 ↔ (n – 1)d ²D_3/2,5/2 and np ²P_1/2,3/2 ↔ (n + 1)s ²S_1/2 in an alkali metal atom; as a result of this interaction, the upper state of the satellite transition acquires admixtures of the A(np ²P_1/2,3/2)CF₄(ν₃ = 0) resonance states.

中文翻译：

---

CF4 气相混合物光谱中 K、Rb 和 Cs 原子偶极禁止跃迁到低位 2S1/2 和 2D3/2,5/2 激发态的卫星

摘要

_{发现 CF 4气体混合物中原子 K、Rb 和 Cs 的}D ₁共振线的发光激发光谱包含卫星跃迁，对应于原子向 ( n – 1) d ² D态的跃迁_3/2,5/2和 ( n + 1) s ² S _1/2，其中k、Rb 和 Cs 分别为n = 4、5 和 6，同时激发 CF ₄分子振动红外主动模式频率 ν ₃，量子能量为 1283 cm ^–1。这些卫星跃迁为 A( ns ² S _1/2 ) + CF ₄ (ν ₃ = 0) + h ν → A(( n – 1) d ² D _3/2,5/2 ) + CF ₄ (ν ₃ = 1) 和 A( ns ² S _1/2 ) + CF ₄ (ν ₃ = 0) + h ν → A(( n + 1) s ² S _1/2 ) + CF ₄ (ν ₃ = 1)，其中 A = K、Rb 和 Cs。这些渐进态的上态和下态之间出现光学耦合（在 \({{R}_{{{\text{A}} - {\text{C}}{{{\text{F}} }_{4}}}}}\) → ∞) 禁戒跃迁被证明是由CF _{4分子中 ν 3}  = 1 ↔ ν ₃ = 0 振动跃迁的偶极矩与偶极矩相互作用引起的电子跃迁np ² P _1/2,3/2 ↔ ( n – 1) d ² D _3/2,5/2和np ² P _1/2,3/2 ↔ ( n + 1) s ² S _1/2为碱金属原子；由于这种相互作用，卫星跃迁的上态获得了 A( np ² P _1/2,3/2 )CF ₄ (ν ₃ = 0) 共振态的混合。