Abstract
Rotational spectra of zinc monohydride and deuteride in the X 2Σ + vibronic ground state were observed by using a source-modulated submillimeter-wave spectrometer. The zinc hydride or deuteride radical was generated in the heat-pipe stainless steel cell by dc glow discharge in a mixture of zinc vapor and H 2 or D 2 gas, respectively. Five to six fine and hyperfine components of the N = 1-0 transition of zinc monohydrides for the three isotopic species of 64Zn, 66Zn, and 68Zn were measured in the frequency region of 380 to 400 GHz, and 10 to 14 components of the N = 1-0 and 2-1 transitions of deuterides were measured in the frequency regions around 200 and 400 GHz, respectively. The molecular constants including the rotational constants, centrifugal distortion constants, spin-rotation coupling constants with their centrifugal distortion terms, and hyperfine coupling constants for the hydrogen and deuterium nuclei were precisely determined.
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