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LABORATORY MEASUREMENTS OF THE HYPERFINE STRUCTURE OF H~(14)N~(12)C AND D~(14)N~(12)C

机译:H〜(14)N〜(12)C和D〜(14)N〜(12)C超细结构的实验室测量

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摘要

The nuclear quadrupole hyperfine structure of H~(14)N~(12)C and D~(14)N~(12)C has been resolved in the laboratory for the first time using millimeter-wave absorption spectroscopy. The transient species were produced in a pulsed DC discharge nozzle, and Doppler broadening effects were minimized by propagating the millimeter waves coaxially with the supersonic molecular beam. New rest frequencies for the J = 1-0, J = 2-1, and J = 3-2 rotational transitions of the ground vibrational state were determined. The nuclear quadrupole coupling constants derived from the spectra are (eQq)_N = 264.5 ± 4.6 kHz for H~(14)N~(12)C and (eQq)_N = 294.7 ± 13.1 kHz and (eQq)_D = 261.9 ± 14.5 kHz for D~(14)N~(12)C.
机译:H〜(14)N〜(12)C和D〜(14)N〜(12)C的核四极超精细结构已在实验室首次使用毫米波吸收光谱法进行了解析。瞬态物质是在脉冲直流放电喷嘴中产生的,通过将毫米波与超音速分子束同轴传播,可以将多普勒展宽效应降至最低。确定了地面振动状态的J = 1-0,J = 2-1和J = 3-2旋转过渡的新静止频率。对于H〜(14)N〜(12)C,从光谱得出的核四极耦合常数为(eQq)_N = 264.5±4.6 kHz,(eQq)_N = 294.7±13.1 kHz和(eQq)_D = 261.9±14.5 D〜(14)N〜(12)C的kHz。

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