Optical spectroscopy of CrO and electronic states of the Cr group metal monoxides  

作　　者：张磊 于尧 马新文 杨杰 Lei Zhang;Yao Yu;Xinwen Ma;Jie Yang(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;Advanced Energy Science and Technology Guangdong Laboratory,Huizhou 516003,China;CAS Key Laboratory of High Precision Nuclear Spectroscopy,Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 73000,China)

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Advanced Energy Science and Technology Guangdong Laboratory,Huizhou 516003,China [4]CAS Key Laboratory of High Precision Nuclear Spectroscopy,Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 73000,China

出　　处：《Chinese Physics B》2023年第5期63-75,共13页中国物理B（英文版）

基　　金：the National Key R&D Program of China(Grant No.2022YFA1602500);the National Natural Science Foundation of China(Grant No.12027809);Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB21030900)。

摘　　要：All of the experimentally known electronic states of the Cr group metal monoxides(Cr O,Mo O,and WO)have been presented in the paper.The optical spectra of the Cr O molecule have been investigated in the gas phase through a combination of the laser-induced fluorescence(LIF)excitation and single-vibronic-level(SVL)emission spectroscopy in the supersonic expansion.The rotational constants of the vibronic electronic states,including X^(5)Π_(-1)(v=0–3),B^(5)Π_(-1)(v=0–10),and B~5Π_1(v=1,5),and the vibrational constants of the spin–orbit components X^(5)Π_(-1,0,1)have been obtained.The molecular constants of the Mo O and WO molecules have been summarized by reviewing the previous spectroscopic studies,and a comprehensive energy level diagram of the Cr group metal monoxides has been constructed.By comparing the electronic configurations,bond lengths,and vibrational frequencies of all the transition metal monoxides in the ground electronic state,the significance of the relativistic effect in the bonding of the 5d transition metal monoxides has been discussed.The related spectroscopic data of the Cr O molecule are available at https://doi.org/10.57760/sciencedb.j00113.00085.

关 键 词：laser-induced fluorescence(LIF) transition metal monoxide electronic state molecular constant relativistic effect 

分 类 号：TQ136.1[化学工程—无机化工]