A new measurement of the 1s2s2p 4p0-1s2p2 4p transitions in c iv: Wavelengths, fine structure intervals and lifetimes

L. Engstrom; R. Hutton; N. Reistad; I. Martinson; S. Huldt; S. Mannervik; E. Trabert

doi:10.1088/0031-8949/36/2/011

A new measurement of the 1s2s2p ⁴p⁰-1s2p² ⁴p transitions in c iv: Wavelengths, fine structure intervals and lifetimes

L. Engstrom, R. Hutton, N. Reistad, I. Martinson, S. Huldt, S. Mannervik, E. Trabert

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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 1s2p² ⁴p 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 1s2p² ⁴p 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.

Original language	English
Pages (from-to)	250-254
Number of pages	5
Journal	Physica Scripta
Volume	36
Issue number	2
DOIs	https://doi.org/10.1088/0031-8949/36/2/011
Publication status	Published - 1987 Aug 1

Subject classification (UKÄ)

Atom and Molecular Physics and Optics

Access to Document

10.1088/0031-8949/36/2/011

Cite this

@article{05d789e2623849efb72c2c726d12b90d,

title = "A new measurement of the 1s2s2p 4p0-1s2p2 4p transitions in c iv: Wavelengths, fine structure intervals and lifetimes",

abstract = "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 1s2p2 4p 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 1s2p2 4p 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.",

author = "L. Engstrom and R. Hutton and N. Reistad and I. Martinson and S. Huldt and S. Mannervik and E. Trabert",

year = "1987",

month = aug,

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doi = "10.1088/0031-8949/36/2/011",

language = "English",

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TY - JOUR

T1 - A new measurement of the 1s2s2p 4p0-1s2p2 4p transitions in c iv

T2 - Wavelengths, fine structure intervals and lifetimes

AU - Engstrom, L.

AU - Hutton, R.

AU - Reistad, N.

AU - Martinson, I.

AU - Huldt, S.

AU - Mannervik, S.

AU - Trabert, E.

PY - 1987/8/1

Y1 - 1987/8/1

N2 - 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 1s2p2 4p 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 1s2p2 4p 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.

AB - 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 1s2p2 4p 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 1s2p2 4p 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.

U2 - 10.1088/0031-8949/36/2/011

DO - 10.1088/0031-8949/36/2/011

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VL - 36

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