采用延迟脉冲场电离方法测量了各斯塔克能态在不同外电场下的寿命。
The lifetimes of the Stark manifold states are measured by using delayed electric field ionization.
结果表明，虚光子过程使原子处在激发态的寿命缩短，并导致原子的基态能漂移。
It is shown hat the process of virtual photons shortens the lifetime of atom in excitation state, and remits in drift of energy levels of the ground state of atom.
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