温度对铷原子D_2线饱和吸收光谱的影响  

Temperature dependence of Rb D_2 line in saturation spectroscopy

作　　者：姚景芹[1] 张尧[1] 侯飞雁[1] 张洁[1] 陈星[1] 申玉梅[1] 董有尔[1] 

机构地区：[1]山西大学物理电子工程学院,太原030006

出　　处：《原子与分子物理学报》2008年第5期1057-1062,共6页Journal of Atomic and Molecular Physics

基　　金：国家级物理实验教学示范中心建设基金(2006-12);<近代物理实验>国家级精品课程建设基金(2006-12);国家基础科学人才培养基金(J0730317)

摘　　要：从理论上分析了铷原子蒸汽温度对87Rb和85Rb D2线饱和吸收光谱在消除了多普勒背景情况下的光谱相对强度的影响.由于有效原子数密度、多普勒加宽、电极化率受温度变化的影响,每一条超精细谱线的相对强度随着温度的升高都会出现先增大后减小的变化趋势,相对强度最高时的温度称为最佳温度.对于87Rb或85Rb来说,不同超精细谱线最佳温度不同的主要原因是由于烧孔面积和跃迁几率不同造成的,而87Rb和85Rb不同超精细谱线最佳温度不同的主要原因是由于它们在自然界中丰度不同造成的.Temperature dependence of the relative intensities of the Doppler-free signals of ^87Rb and ^85Rb D2 line in saturation spectroscopy is analyzed theoretically. With the increase of temperature, the relative intensity of each Doppler-free hyperfine spectroscopy has a trend of increase at the beginning, then decrease as the result of the influence of the effective atomic number density, Doppler-broadening and the susceptibility. The temperature corresponding to the highest relative intensity is called optimum temperature. It is hole-burning area and transition probability that mainly result in the optimum temperature difference of different Doppler-free hyperfine spectroscopy for ^87Rb or ^85Rb, while the optimum temperature differences between ^87Rb and ^85Rb are mainly caused by the abundance in natural.

关 键 词：光谱学 铷原子蒸汽温度 烧孔面积 跃迁几率 

分 类 号：O433[机械工程—光学工程]