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A1+ State Lifetime and Predissociation of CuH
De-ping Zhang,Qiang Zhang,Bo-xing Zhu,Yang Chen*,Dong-feng Zhao*
Author NameAffiliationE-mail
De-ping Zhang Hefei National Laboratory for Physical Sciences at the Microscales, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China  
Qiang Zhang Hefei National Laboratory for Physical Sciences at the Microscales, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China  
Bo-xing Zhu Hefei National Laboratory for Physical Sciences at the Microscales, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China  
Yang Chen* Hefei National Laboratory for Physical Sciences at the Microscales, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China yangchen@ustc.edu.cn 
Dong-feng Zhao* Hefei National Laboratory for Physical Sciences at the Microscales, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026, China dzhao@ustc.edu.cn 
Abstract:
A combined cavity ringdown (CRD) and laser induced fluorescence (LIF) spectroscopic study on the A1+-X1+ transition of CuH has been presented.The CuH molecule,as well as its deuterated isotopologue CuD,are produced in a supersonic jet expansion by discharging H2(or D2) and Ar gas mixtures using two copper needles.Different profiles of relative line intensities are observed between the measured LIF and CRD spectra,providing an experimental evidence for the predissociation behavior in the A1+ state of CuH.The lifetimes of individual upper rotational levels are measured by LIF,in which the J'-dependent predissociation rates are obtained.Based on the previous theoretical calculations,a predissociation mechanism is concluded due to the strong spin-orbit coupling between the A1+ state and the lowest-lying triplet 3+ state,and a tunneling effect may also be involved in the predissociation.Similar experiments are also performed for CuD,showing that the A1+ state of CuD does not undergo a predissociation process.
Key words:  CuH molecule  Laser induced fluorescence  Predissociation
FundProject:This work is financially supported by the National Basic Research Program of China (No.2010CB923302 and No.2013CB834602),the National Natural Science Foundation of China (No.21273212,No.21173205,and No.91127042),the Fundamental Research Funds for the Central Universities and Chinese Academy of Sciences (No.KJCX2-YW-N24).
CuH分子A1+态的寿命和预解离研究
张德萍,张强,朱波星,陈旸*,赵东锋*
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DOI:10.1063/1674-0068/30/cjcp1702013
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