摘要
在流动余辉装置上 ,利用Ar与SO2 混合气体的空心阴极放电 ,在放电区的下游观察到一系列光谱 ,将 4 0 0～ 6 0 0nm波长范围内的发射谱带归属为SO(c1Σ-→X3 Σ-)跃迁 ,并得到该跃迁的ν0 0 =2 85 0 0cm-1。这是气相SO自由基c1Σ-电子态的首次直接的光谱观测。
In a flowing afterglow apparatus,the luminescence was observed during the hollow-cathode discharge of Ar and SO_2 mixture.Besides emissions from SO(A 3Π→X 3Σ -) and SO_2(a 3B_1→X 1A_1), a rather strong progression in the range of 400-600 nm is assigned to SO(c 1Σ -→X 3Σ -) transition with ν _ 00 =28 500 cm -1 , ω _e″=1 155.5 cm -1 and ω ″_e χ ″_e=6.6 cm -1 .Another weak progression that was oberved in the range of 400-480 nm is ascribed to the emission from the ν ′=1 level of SO(c 1Σ -) state.Its separation by 673 cm -1 from the main c 1Σ -→X 3Σ - progression agrees with the previous Ar matrix experimental result.This is the first direct observation of the emission spectra of SO(c 1Σ -→X 3Σ -) in gas phase,and provides the first gaseous spectroscopic information about the SO(c 1Σ -) state.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期630-633,共4页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金
中科院合肥物质科学研究院院长基金资助项目
