Submillimeter-wave spectra of the PH and PD radicals in the 3Σ− state

摘要: Abstract The lowest rotational spectral lines of the PH and PD radicals in their X 3Σ− ground vibronic state were observed by submillimeter-wave spectroscopy using a source-modulated system combined with glow discharge free-space cell. or radical was generated reaction red phosphorus dc discharged H2 D2 gas. Twenty fine hyperfine components N=1-0 transition measured frequency region 423 to 553 GHz, 50 2-1 transitions 181 523 GHz. molecular constants, including spin—spin coupling constants centrifugal distortion terms, associated phosphorus, hydrogen deuterium nuclei, precisely determined least-squares fitting lines.