Rb蒸气中的辐射陷获效应和5P_(1/2)能级有效寿命的测量Radiation Trapping Effect and Measurement of the Rb(5P_(1/2)) Level Effective Radiative Times in the Vapor
王敏,王君,姜家亮,戴康,王倩
摘要(Abstract)：
本文测量了Rb蒸气中(5P1/2)共振能级的有效寿命.圆柱形样品池充入金属Rb,样品池温度在333K～373K之间,在池中产生10(11)～10(12)cm-3的Rb原子密度.使用Nd:YAG脉冲激光器(泵浦激光)将Rb原子激发至5P(3/2)态,测定了转移荧光随时间衰减的曲线.由于辐射陷获效应的存在,有效辐射率是自然辐射率与透射因子的乘积.对5P(1/2)→5S(1/2)跃迁荧光曲线的测量,利用最小二乘法拟合及速率方程得到的不同温度下的有效寿命与霍斯坦理论计算得到的相符.
关键词(KeyWords)： 有效寿命;辐射陷获;Rb蒸气
基金项目(Foundation): 国家自然科学基金项目(106650021)
作者(Author): 王敏,王君,姜家亮,戴康,王倩
参考文献(References)：
- [1]微弱信号检测小组.取样积分器―一种检测微弱信号的手段[J].实验技术与实验方法,1993,8(2):154-160.
- [2]林美容,李湘正,等.测量分子荧光寿命的一种新方法[J].发光学报,1988,9(2):144-151.
- [3]Kleiber P D.Collisional energy transfer in Na(4P-3D)-He,H2collisions[J].J Chem Phys,1993,1101-1104.
- [4]Chorazy J.Investigation of resonance radiation trapping for optically saturated32S1/2-32P1/2transition in sodium vapour[J].Optics Communications,1996,15(1):65-69.
- [5]贾锁堂,秦莉娟,等.钾分子23g→a3u+辐射跃迁的荧光寿命测量[J].光谱学与光谱分析,1995,15(1):9-12.
- [6]Chorazy J.Investigation of resonance radiation trapping for optically saturated32S1/2-32P1/2transition in sodium vapour[J].Optics Communications,1996,125(7):65-69.
- [7]Huennenkens J.Radiation trapping in sodium-noble-gas mixtures[J].Phy Rev A,1986,168(5):2892-2900.
- [8]Huennenkens J.Radiation diffusion and saturation in optically thick Na vapor[J].Phy Rev A,1982,273(4):238-246.
- [9]Constantine E.Lifetimes of allali-metal-atom Ryderg states[J].Phy Rev A,1983,48(1):28-34.
- [10]Ekers1.a A.Inelastic cross-sections and natural lifeimes for the62D3/2,5/2and82S1/2states of Rb[J].Eur Phys J D,2000,8(2):49-58.
- [11]Gallagher*A.Determination of the vapor pressure of rubidium by optical absorption[J].Phy Rev A,1973,63(7):864-869.