A(1)-A(2) splitting of CH3D

作者：Abe Masashi^*; Sera Hideyuki; Sasada Hiroyuki

来源：Journal of Molecular Spectroscopy, 2015, 312: 90-96.

DOI：10.1016/j.jms.2015.04.003

• Isotope methane
• A(1)-A(2) splitting
• Mid-infrared
• Sub-Doppler resolution
• Optical frequency comb
• Difference frequency generation

Sub-Doppler resolution spectroscopy of CH3D has been carried out from 88.6 to 93.1 THz. Thirty transitions of the v(1) and v(4) bands from the low-J and K = 3 levels are observed, and the A(1)-A(2) splitting is resolved for twenty-three of the thirty transitions. The absolute frequencies are determined with a typical uncertainty of 4 kHz. The effective A(1)-A(2) splitting constant of the K = 3 levels is 2h(3,v=0) = (1.5641 +/- 0.0026) Hz for the ground vibrational state, and those of the K = 3 levels for the v(1) = 1 state and of the (K = 2, l = -1) and (K = 4, l = +1) levels for the v(4) = 1 state are also determined.

• 出版日期2015-6