中文摘要：

光学频率标准会受到环境温度的黑体辐射影响发生频移，进而影响其准确度．本文估算了珀。199^Hg＋的超精细能级5d^106s1/2（F=0）和5d^96s^2 2^D5／2（F=2）的极化率，得到了室温（300K）下黑体辐射引起的相对频移为-5．4x10^-7，最后讨论了低温环境下黑体辐射对199^Hg＋光频标的影响．

英文摘要：

The background blackbody radiation causes the shift of the hyperfine energy level and affects the accuracy of the optical frequency standard. The polarizabilities of the hyperfine energy levels 5d^106s^2S1/2 （F = 0） and 5d^96s^2 2^D5/2 （F = 2） of 199Hg＋ are evaluated and the relative frequency shift at room temperature due to blackboby radiation is calculated to be -5.4 x 10^-17. Finally the effect of blackbody radiation on single 199^Hg＋ optical frequency standard is discussed at an ultralow temperature.