Abstract：The CN radical was produced by Penning AC discharge of the mixture of trace acetonitrile (36 Pa) and helium (660 Pa) and the ro-vibrational spectra were measured by optical heterodyne magnetic rotation enhanced concentration modulation spectroscopy in the range of 16 850-17 480 cm-1. 138 lines and 118 lines were assigned to the (6, 1) and (7, 2) bands in red system A 2Пi—X 2Σ+ of CN respectively, while others were due to (8, 3) band in CN red system and C2 Swan band system. More accurate molecular constants of A 2Пi(ν=6, 7) state and perturbation parameters ξ and η between A and X states were derived based on nonlinear least-square fitting, individually, by diagonalizing the effective Hamiltonian matrix involving the perturbation elements of two electronical states and the standard deviation of fitting was less than the experimental uncertainty 0.007 cm-1, which implied the accuracy of our results.
安丽琼，杨晓华，郭迎春，徐怡敏，许朝雄，陈扬骎*，刘煜炎 . CN红带A 2Пi—X 2Σ+(6，1)和(7，2)带振转光谱研究 [J]. 光谱学与光谱分析, 2005, 25(01): 65-68.
AN Li-qiong, YANG Xiao-hua, GUO Ying-chun, XU Yi-min, XU Chao-xiong, CHEN Yang-qin*，LIU Yu-yan . Investigation of the (6, 1) and (7, 2) Bands in the A 2Пi—X 2Σ+ Red System of CN Radical . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(01): 65-68.
[1] Davis S P，Phillips J G. The Red System(A <sup>2</sup>П<sub>ｉ</sub>-X <sup>2</sup>Σ<sup>+</sup>)of the CN Molecule. Berkeley：University of California Press，1963. 50. [2] Cerny D，Bacis R，Huelachvili G et al. J. Mol. Spectrosc.，1978，73: 154. [3] Kotlar A J，Field R W，Steinfeld J I. J. Mol. Spectrosc.，1980，80: 86. [4] Prasad C V V，Bernath P F. J. Mol. Spectrosc.，1992，156: 327. [5] Gudeman C S，Saykally R J. Ann. Rev. Phys. Chem.，1984，35: 387. [6] Zhuang H，Chen Y Q，Ji W H et al. Chin. Sci. Bull.，2001，46: 1866. [7] Wu S H，Chen Y Q，Zhuang H et al. J. Mol. Spectrosc.，2001，209: 133. [8] Zhuang H，Yang X H，Wu S H et al. Mol. Phys.，2001，99: 1447. [9] Xu C X，Wu L，Liu J J et al. Chin. Phys. Lett.，2002，19: 1277. [10] Wang R J，Chen Y Q，Cai P P et al. Chem. Phys. Lett.，1999，307: 339. [11] WU Sheng-hai，LIU Yu-yan，WU Ling et al(吴升海，刘煜炎，吴 玲等). J. Chem. Phys.(化学物理学报)，2002，15: 321. [12] Zare R N，Schmeletekopf A L，Harrop W J et al. J. Mol. Spectrosc., 1973，46: 37. [13] Amiot C，Maillard J P，Chauville J. J. Mol. Spectrosc.，1981，87: 196.
