激光选择性离化铷同位素及铷同位素位移测量

LASER SELECTED IONIZATION OF Rb AND MEASUREMENT OF ISOTOPE SHIFT ON Rb.

在热管炉内,利用760.1nm激光无多普勒双光子泵浦将Rb从基态5S_(1/2)激发到7S态,然后用连续Nd·YAG激光将原子从7S态激发至电离态.离子由带负电的极板收集.离子信号经锁相放大器放大进入x-y记录仪记录.我们观察到选择性激发离化Rb^(85),Rb^(87)信号,并给出了Rb(7S)态的同位素位移,同时也观察到5S→7S跃迁的超精细结构.

In a heat pipe furnace, Rb atoms, pumped by two-photon Doppler tree absorp tion (760.1 nm), are excited from the ground state 5S1/2 to state 7S. Then the atoms are excited to the ionization state by Nd·YAG laser. The signals of the ions of Rb are amplified by the look-in amplifier and then enter the x-y record. Selected ionization signals of Rb85 and Rb87 are observed, and the isotope shift of Rb(7S) is obtained. The super-fine structure of Rb (5S→7S) has also been observed.