Detection of low-frequency lambda-doublet transitions of the free 12CH and 13CH radicals
作者： M. C. McCarthy , S. Mohamed , J. M. Brown , P. Thaddeus
关键词: Rotational spectroscopy 、 Orders of magnitude (time) 、 Low frequency 、 Yield (chemistry) 、 Fourier transform 、 Hyperfine structure 、 Ground state 、 Chemistry 、 Radical 、 Analytical chemistry
摘要: By Fourier transform microwave spectroscopy, lambda-doubling transitions of 12CH and 13CH in the lowest rotational levels X2∏1/2 ground state have been directly detected, which has not done previously. For both radicals, hyperfine-split lines measured to an accuracy better than 1 ppm between 3 15 GHz, improvement at least 2 orders magnitude over previous laboratory data. The frequencies combined with all data for CH v = 0 level X2∏ electronic determine improved hyperfine parameters. production from various gases also studied and, methanol, yield relative OH. Astronomical studies higher can now be undertaken on basis present work.
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