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- Title
Fourier-Transform VUV Spectroscopy of 14,15N and 12,13C.
- Authors
Lai, Kin-Fung; Ubachs, Wim; De Oliveira, Nelson; Salumbides, Edcel J.
- Abstract
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 2 s 2 2 p 3 4 S 3 / 2 ground state and from the 2 s 2 2 p 3 2 P and 2 D metastable states were determined in the 95–124 nm range at an accuracy of 0.025 cm − 1 . The combination of these results with data from previous precision laser experiments in the vacuum ultraviolet range reveals an overall and consistent offset of −0.04 cm − 1 from values reported in the NIST database. The splittings of the 2 s 2 2 p 3 4 S 3 / 2 – 2 s 2 p 4 4 P J transitions are well-resolved for 14 N and 15 N and the isotope shifts determined. While excitation of a 2 p valence electron yields very small isotope shifts, excitation of a 2 s core electron results in large isotope shifts, in agreement with theoretical predictions. For carbon, six transitions from the ground 2 s 2 2 p 2 3 P J and 2 s 2 2 p 3 s 3 P J excited states at 165 nm are measured for both 12 C and 13 C isotopes.
- Subjects
NATIONAL Institute of Standards &; Technology (U.S.); VACUUM ultraviolet spectroscopy; ISOTOPE shift; ATOMIC transitions; CONDUCTION electrons; METASTABLE states; ULTRAVIOLET spectrometry; ULTRAVIOLET spectroscopy
- Publication
Atoms (2218-2004), 2020, Vol 8, Issue 3, p62
- ISSN
2218-2004
- Publication type
Article
- DOI
10.3390/atoms8030062