关键词: 分子光谱/
α常数/
μ常数/
碘离子光谱/
精密测量
English Abstract
Spectra of I2+ for possible measurement of α and μ constant
Mu Xiu-Li1,Li Chuan-Liang2,
Deng Lun-Hua1,
Wang Hai-Ling1
1.State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China;
2.School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 11674096, 11504256).Received Date:28 June 2017
Accepted Date:13 August 2017
Published Online:05 December 2017
Abstract:The forbidden transitions of I2+ may be used to measure the variations of α and μ constant in an enhanced sensitivity. We analyze the rotational spectrum of I2+ between 11860 and 13100 cm-1 and assign 5759 lines to 31 bands in an A2Π3/2-X2Π3/2 system. The accurate rotational molecular constants of 5 levels in X2Π3/2 state and 9 levels in A2Π3/2 state are obtained. On condition that the signal-to-noise ratio is limited by quantum projection noise and the linewidth is 1 Hz, the forbidden transition between X2Π3/2 and X2Π1/2 should be able to achieve the sensitivities of δα/α ≈ 2.37×10-19 a-1 and δμ/μ ≈ 1.18×10-18 a-1.
Keywords: molecular spectroscopy/
α constant/
μ constant/
spectrum of I2+/
precision measurement
