Two-photon dissociation of BeH^(+)with a middle ultraviolet band laser  

作　　者：Qian-Yu Zhang Wen-Li Bai Zhi-Yuan Ao Wen-Cui Peng Sheng-Guo He Xin Tong 张乾煜;白文丽;敖致远;彭文翠;何胜国;童昕

机构地区：[1]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Wuhan Institute of Quantum Technology,Wuhan 430206,China

出　　处：《Chinese Physics B》2025年第3期348-353,共6页中国物理B(英文版)

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2021YFA1402103);the National Natural Science Foundation of China(Grant No.12393825)。

摘　　要：Two-photon dissociation of BeH^(+)ions is studied by detecting the fluorescence changes of Be^(+)-BeH^(+)bi-component Coulomb crystal in a linear Paul trap.BeH^(+)ions generated by an exothermic reaction between electronically excited Be^(+)ions and residual H_(2) in the vacuum chamber are photon-dissociated with two photons scanning over the range of 201 nm to 208 nm.Our experiment provides a novel method to maintain the number of Be^(+)ions stable in a Coulomb crystal with a middle ultraviolet band dissociation laser.This two-photon dissociation method extends the wavelength range of the dissociation laser for BeH^(+)compared to the one-photon dissociation,and the method can be utilized to all alkaline earth atomic ions which require suppression of the reaction with residual H_(2) gas in vacuum.

关 键 词：PHOTO-DISSOCIATION two-photon absorption chemical reaction BeH^(+) 

分 类 号：O43[机械工程—光学工程]