[1] Merton T R, Johnson R C. Spectra associated with carbon. Proc. R. Soc. London Ser. (A), 1923, 103(2):383～395

[2] Carroll P K. Structure of the triplet bands of CO. J. Chem. Phys., 1962, 36(11):2861～2869

[3] Herzberg G, Hugo T J. Rotational analysis of the forbidden d3Δi←X1Σ+ absorption bands of carbon monoxide. Can. J. Phys., 1970, 48(24):3004～3015

[4] Field R W, Tilford S G, Howard R A et al.. Fine structure and perturbation analysis of the a3Π state of CO. J. Mol. Spectrosc., 1972, 44(2):347～382

[5] Gero L, Szabo F. The structure of the triplet bands d3Π-a3Π of carbon monoxide. Ann. Phys., 1939, 35:597～618

[6] Marcoux P J, Piper L G, Setser D W. Infrared radiative decay constants for the vibrational levels of CO (a3Π). J. Chem. Phys., 1977, 66(1):351

[7] Momona M, Kanamori H, Sakurai K. High-Resolution study of the perturbation in the CO triplet band. J. Mol. Spectrosc., 1993, 159(1):1～16

[9] Gudeman C S, Saykally R J. Velocity modulation infrared laser spectroscopy of molecular ions. Ann. Rev. Phys. Chem., 1984, 35:387～418

[11] Brown J M, Hougen J T. The Labeling of parity doublet levels in linear molecules. J. Mol. Spectrosc., 1975, 55(1～3):500～503

[12] Wada A, Kanamori H. Submillimeter-wave spectroscopy of CO in the a3Π state. J. Mol. Spectrosc., 2000, 200(1):196～202

[13] Wicke B G, Field R W, Klemperer W. Fine structure, dipole moment, and perturbation analysis of a3Π CO*. J. Chem. Phys., 1972, 56(12):5758～5770

[14] Luo M, Bi Z, Cai P. Optical heterodyne magnetic rotation enhanced velocity modulation spectroscopy: A sensitive absorption-based scheme for paramagnetic molecular ions. Rev. Sci. Instrum., 2001, 72(6):2691～2696

[15] Herzberg G. Molecular Spectra and Molecular Structure Ⅰ, Spectra of Diatomic Molecules. 2nd Edition. New York: Van Nostrand Reinhold Company, 1950. 227～229

[16] Le Floch A C, Launay F. Reinvestigation of the CO A1Π state and its perturbations: the v=0 level. J. Mol. Spectrosc., 1987, 121(2):337～379