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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 ; 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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published
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in
Physica Scripta
volume
36
issue
2
pages
5 pages
publisher
Institute of Physics Publishing Ltd.
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
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2018-10-03 12:12:17
@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    = {Institute of Physics Publishing Ltd.},
  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},
  volume       = {36},
  year         = {1987},
}