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

Engstrom, L. LU ; Hutton, R. LU ; Reistad, N. LU orcid ; Martinson, I. LU ; Huldt, S. LU ; Mannervik, S. and Trabert, E. (1987) In Physica Scripta 36(2). p.250-254
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... (More)

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.

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organization
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type
Contribution to journal
publication status
published
subject
in
Physica Scripta
volume
36
issue
2
pages
5 pages
publisher
IOP Publishing
external identifiers
  • scopus:6244228429
ISSN
0031-8949
DOI
10.1088/0031-8949/36/2/011
language
English
LU publication?
yes
id
05d789e2-6238-49ef-b72c-2c726d12b90d
date added to LUP
2018-03-17 10:32:07
date last changed
2021-01-03 08:08:04
@article{05d789e2-6238-49ef-b72c-2c726d12b90d,
  abstract     = {{<p>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 <sup>4</sup>p<sup>0</sup>and 1s2p<sup>2</sup> <sup>4</sup>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<sup>2</sup> <sup>4</sup>p levels have been determined as = (0.71 0.07)ns for <sup>4</sup>P5/2 and = (1.66 0.13)ns for <sup>4</sup>p3/2. The latter value disagrees with previous experimental results but is in excellent agreement with an isoelectronic trend analysis.</p>}},
  author       = {{Engstrom, L. and Hutton, R. and Reistad, N. and Martinson, I. and Huldt, S. and Mannervik, S. and Trabert, E.}},
  issn         = {{0031-8949}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{2}},
  pages        = {{250--254}},
  publisher    = {{IOP Publishing}},
  series       = {{Physica Scripta}},
  title        = {{A new measurement of the 1s2s2p <sup>4</sup>p<sup>0</sup>-1s2p<sup>2</sup> <sup>4</sup>p transitions in c iv : Wavelengths, fine structure intervals and lifetimes}},
  url          = {{http://dx.doi.org/10.1088/0031-8949/36/2/011}},
  doi          = {{10.1088/0031-8949/36/2/011}},
  volume       = {{36}},
  year         = {{1987}},
}