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Photodissociation Spectra of OCS+ via B2+←X2∏ Transitions
Dan-na Zhou,Li-min Zhang*,Lin Chen,Dan Wu
Author NameAffiliationE-mail
Dan-na Zhou Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Li-min Zhang* Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China lmzha@ustc.edu.cn 
Lin Chen Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Dan Wu Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Abstract:
In the wavelength range of 231-275 nm, we have studied the mass-resolved dissociation spectra of OCS+ via B2+←X23/2(000) and B2+←X21/2(000, 001) transitions by preparing OCS+ ions in the well-defined spin-orbit states. The spectroscopic constants of υ1(CS stretch)=828.9 (810.4) cm-1, υ2(bend)=491.3 cm-1 and υ3(CO stretch)=1887.2 cm-1 for OCS+(B2+) are deduced. The observed dependence of the υ2(bend) mode excitation of B2+ on the spin-orbit splitting of X2∏(Ω=1/2, 3/2) in the B2+←X2∏ transition can be attributed to the K coupling between the (000)21/2 and (010)2+1/2 vibronic levels of X2∏ state, which makes the B2+(010)←X21/2(000) transition possible.
Key words:  OCS+, Photodissociation, Bending vibration mode, K coupling
FundProject:
OCS+分子经由B2+←X2∏跃迁的光解离谱
周丹娜,张立敏*,陈琳,吴丹
摘要:
制备出确定旋轨态的OCS+(X2∏)离子,在260~325 nm波长范围内研究了OCS+经由B2+←X23/2(000)和B2+←X21/2(000,001)跃迁的分质量光解离谱.由光解离谱得到OCS+(B2+)电子态的光谱常数υ1(CS stretch)=828.9(810.4) cm-1,υ2(bend)=491.3 cm-1和υ3(CO stretch)=1887.2 cm-1.在B2+←X2∏跃迁谱中只能观察到B2+(010)←X21/2(000)跃迁的谱峰, 而观察不到B2+←X23/2(000)跃迁的谱峰. 用X2∏电子态的(000)21/2和(010)2+1/2电子振动能级之间的K耦合解释了这种B2+的υ2弯曲振动模的激发对X2∏电子态的旋轨分裂分量(Ω=1/2,3/2)的相关性
关键词:  OCS+,光解离,弯曲振动模,K耦合
DOI:10.1063/1674-0068/26/03/265-269
分类号: