Stark-Mixing Effect on the 6p~3 ~2P_3/_2 -6p~3 ~4S_3/_2 Transition in Bi I

摘要

The 301.5 nm electric-field-induced quench radiation on a thermal beam of neutral Bi atoms in the metastable 6p~3 2P_3/_2 state for transition to the ground 6p~3 ~4S_3/_2 state was observed. The measurement of the Stark-enhanced intensity of the radiation as a function of the electric field yields a relation- ship between the field-free-decay rates for transitions between the metastable 6p~3 ~2P_3/_2 state and the nearby states that are mixed in by the field. Using the known decay rates, the measurement sets an approximate transition rate of A(6p~3 ~2P_3/_2 → 6p~27s ~4P_1/_2) ≈(0.50±0.05)s_-1.