Hyperfine structure and isotope shifts in near-infrared transitions of atomic nitrogen期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Hyperfine structure and isotope shifts in near-infrared transitions of atomic nitrogen

Authors:	R M Jennerich A N Keiser D A Tate

Institution:	(1) Department of Physics and Astronomy, Colby College, Waterville, ME 04901, USA

Abstract:	We have obtained Doppler-free spectra of transitions in the ${2p^2(^3{\rm P}) \ 3s\ {}^4{\rm P}}$ → 2p²(³P) ${3p\ {}^4{\rm P}^{\circ}}$ and ${2p^2(^3{\rm P}) \ 3s\ {}^4{\rm P}}$ → ${2p^2(^3{\rm P}) \ 3p\ {}^4{\rm D}^{\circ}}$ multiplets of atomic nitrogen using saturated absorption spectroscopy. These multiplets consist of respectively of seven and eight transitions, and have center of gravity wavelengths of 821 nm and 869 nm. Values for the hyperfine structure coupling constants of all the upper and lower states for these multiplets were obtained for both ¹⁴N and ¹⁵N. Isotope shifts of three transitions in each multiplet were also measured, and a significant J-dependence to the shifts was observed.

Keywords:	32 10 Fn Fine and hyperfine structure 32 30 Jc Visible and ultraviolet spectra
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