Microwave spectroscopy of propynal in the v2 = 1 vibrational state by IR-MW triple resonance |
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| Authors: | Michio Takami Masao Suzuki |
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| Institution: | Microwave Physics Laboratory, The Institute of Physical and Chemical Research, Wako, Saitama 351, Japan;Department of Electronic Engineering, Tokyo Institute of Polytechnic, Iyama 1583, Atsugi 243-02, Japan |
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| Abstract: | Infrared-microwave triple resonance was applied to microwave spectroscopy of propynal, HCCCHO, in the v2 = 1 vibrational state. Eleven microwave transitions were newly observed by using a Zeeman-tuned 3.51 μm HeXe laser as the infrared radiation source. The spectrum was analyzed including the 11 transitions previously observed by double resonance. A least-squares fit of the 13 low-J transitions revealed that the rotational constants in the K?1 = 1 states were slightly different from those of the K?1 = 0 states. A higher-order rotational resonance was proposed for explanation of the effect. |
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