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arXiv 0903.1660physics.atom-ph
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Hg原子6s6p^3P_1 - 6s^2^1S_0跃迁斯塔克诱导吸收的计算

Calculation of Stark-induced absorption on the 6s6p ^3P_1 - 6s^2 ^1S_0 transition in Hg

K. Beloy, V. A. Dzuba, A. Derevianko

摘要:

我们用相对论多体方法计算了$^{199}$ Hg原子254 nm $6s6p ^3P_1 (F=1/2) - 6s^2 ^1S_0$线上的斯塔克诱导吸收系数,Lamoreaux和Fortson曾用简单的中心场估计[Phys.Rev.A { \bf 46},7053(1992)]考虑过这种效应。斯塔克诱导的相反宇称态的混合打开了额外的M1和E2跃迁通道。我们发现,由此产生的M1-E1吸收占主导地位超过E2-E1吸收。E2-E1吸收系数的值强烈地依赖于相关问题的处理细节。结果,我们的数值与早先的中心场计算的数值有很大的不同。这种效应的可靠计算可以使一个有用的实验检查的光学技术被用来寻找永久的电偶极矩的$^{199}$汞原子。

英文摘要:

We carry out relativistic many-body calculations of the Stark-induced absorption coefficient on the 254-nm $6s6p ^3P_1 (F=1/2) - 6s^2 ^1S_0$ line of $^{199}$Hg atom, the effect considered before by Lamoreaux and Fortson using a simple central field estimate [Phys. Rev. A {\bf 46}, 7053 (1992)]. The Stark-induced admixing of states of opposite parity opens additional M1 and E2 transition channels. We find that the resulting M1-E1 absorption dominates over E2-E1 absorption. The value of the E2-E1 absorption coefficient depends strongly on the details of treatment of the correlation problem. As a result, our numerical values differ substantially from those of the earlier central field calculation. Reliable calculation of this effect can enable a useful experimental check on the optical technique being used to search for a permanent electric dipole moment of the $^{199}$Hg atom.

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