A new measurement of the 1s2s2p ⁴p⁰-1s2p^{2 4}p transitions in c iv : Wavelengths, fine structure intervals and lifetimes

Summary, in English

The n = 0 transition multiplet connecting the lowest quartet states of doubly excited C IV has been studied by beam-foil spectroscopy. The fine structure splittings obtained for the 1s2s2p ⁴p⁰and 1s2p^{2 4}p terms confirm previous experimental results with an improved accuracy. The average transition wavelength = (1344.49 0.04)A is now more precisely determined by about a factor of eight. At the new level of precision this value shows a small but significant deviation from the best theoretical predictions. The lifetimes of the 1s2p^{2 4}p levels have been determined as = (0.71 0.07)ns for ⁴P5/2 and = (1.66 0.13)ns for ⁴p3/2. The latter value disagrees with previous experimental results but is in excellent agreement with an isoelectronic trend analysis.

• Författare: L. Engstrom; R. Hutton; N. Reistad; I. Martinson; S. Huldt; S. Mannervik; E. Trabert
• Avdelning/ar: Fysiska institutionen
• Publiceringsår: 1987-08-01
• Språk: Engelska
• Sidor: 250-254
• Publikation/Tidskrift/Serie: Physica Scripta
• Volym: 36
• Issue: 2
• Länkar: http://dx.doi.org/10.1088/0031-8949/36/2/011
• Dokumenttyp: Artikel i tidskrift
• Förlag: IOP Publishing
• Ämne: Atom and Molecular Physics and Optics
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 0031-8949