论文标题
$^{14,15} $ n和$^{12,13} $ c的傅立叶变换vuv光谱
Fourier-transform VUV spectroscopy of $^{14,15}$N and $^{12,13}$C
论文作者
论文摘要
精确的傅立叶转换光谱吸收测量在原子氮和碳中真空紫外线过渡的测量在Soleil同步子上进行。对于$^{14} $ n从$ 2S^22p^3 \，^4 $ s $ _ {3/2} $地面状态以及$ 2S^22p^3 \，^2 $ p和$^2 $ d crigedenable的状态从$ 95-124 $ nm范围确定，准确地确定了$ 0.025 \ $ 0.025 \，nm}。这些结果与来自真空紫外线范围的先前精确激光实验的数据的组合表明，与NIST数据库中报告的值相比，总体且一致的偏移为-0.04 \ wn \。 ％$ 2S^22p^3 \，^4 $ S $ _ {3/2} $ - ％$ 2S2P^4 \，^4 $ P $ _ {5/2,3/2,1/2} $ $ 2S2P^4 \，^4 $ p $ _ {J} $转换对$^{14} $ n和$^{15} $ n和同位素偏移确定。虽然$ 2p $ $ Valence电子的激发产生的同位素转移很小，但$ 2S $核心电子的激发会导致大型同位素转移，这与理论预测一致。对于碳六个过渡，$ 2S^22p^2 \，^3 $ p $ _ {j} $和$ 2S^22p3s \，^3 $ p $ _ {J {J} $兴奋的状态$ 165 $ nm均以$^{12} $ C和$ c和$^{13} $ c的$ 165 $ nm衡量。
Accurate Fourier-transform spectroscopic absorption measurements of vacuum ultraviolet transitions in atomic nitrogen and carbon were performed at the Soleil synchrotron. For $^{14}$N transitions from the $2s^22p^3\,^4$S$_{3/2}$ ground state and from the $2s^22p^3\,^2$P and $^2$D metastable states were determined in the $95 - 124$ nm range at an accuracy of $0.025\,\mathrm{cm}^{-1}$. Combination of these results with data from previous precision laser experiments in the vacuum ultraviolet range reveal an overall and consistent offset of -0.04 \wn\ from values reported in the NIST database. %The splitting of the $2s^22p^3\,^4$S$_{3/2}$ -- %$2s2p^4\,^4$P$_{5/2,3/2,1/2}$ The splittings of the $2s^22p^3\,^4$S$_{3/2}$ -- $2s2p^4\,^4$P$_{J}$ transitions are well-resolved for $^{14}$N and $^{15}$N and isotope shifts determined. While excitation of a $2p$ valence electron yields very small isotope shifts, excitation of a $2s$ core electron results in large isotope shifts, in agreement with theoretical predictions. For carbon six transitions from the ground $2s^22p^2\,^3$P$_{J}$ and $2s^22p3s\, ^3$P$_{J}$ excited states at $165$ nm are measured for both $^{12}$C and $^{13}$C isotopes.
