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在气体样品池条件下,研究了Rb(5P_J)+(Ne、N_2)碰撞能量转移过程。对于5P_J与Ne的碰撞,电子态能量仅能转移为Ne原子的平动能。在与N_2的碰撞中,向分子振转态的转移是重要的。调频半导体激光器稍微调离共振线,激发Rb原子至Rb(5P_(3/2))态,在不同的Ne或N_2气压下,测量了5P_(1/2)→5S_(1/2)与5P_(3/2)→5S_(1/2)荧光强度比。利用速率方程分析,可以得到碰撞转移速率系数,对于Ne,5P_(3/2)→5P_(1/2)转移速率系数为1.53×10~(-12)cm~3s~(-1)。对于N_2,由5P_J+Ne和5P_J+N_2二种情况下5P_(1/2)与5P_(3/2)荧光的相对强度比,利用最小二乘法确定5P_(3/2)→5P_(1/2)转移速率系数为8.83×10~(11)cm~3s~(-1),5P_J态猝灭速率系数为1.25×10~(-10)cm~3s~(-1)。对实验结果进行了定性的讨论。
Under gas sample cell conditions, the energy transfer process of Rb (5P_J) + (Ne, N_2) collision was studied. For the collision of 5P_J with Ne, the electron state energy can only transfer to the translational energy of Ne atom. In the collision with N2, the transfer to the molecular vibrational state is important. The frequency modulation semiconductor laser is slightly away from the resonance line and excites the Rb atoms to the 5P 3/2 state. Under the different Ne or N 2 pressures, the effects of 5P 1/2 (1/2) → 5S 1/2 (1/2) and 5P 3/5 (3/2) → 5S_ (1/2) fluorescence intensity ratio. The coefficient of collision transfer rate can be obtained by the rate equation analysis. For Ne, the transfer rate coefficient of 5P 3/2 to 5P 1/2 is 1.53 × 10 ~ (-12) cm ~ 3s -1. For N_2, the relative intensities of 5P_ (1/2) and 5P_ (3/2) fluorescence under the conditions of 5P_J + Ne and 5P_J + N_2 were determined by the least squares method, and the 5P_ (3/2) → 5P_ 2) the transfer rate coefficient is 8.83 × 10 ~ (11) cm ~ 3s -1, and the quenching rate coefficient of 5P_J state is 1.25 × 10 -10 cm -3 s -1. The experimental results were qualitatively discussed.