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University Lecturer Nina Reistad MSc, PhD

Nina Reistad

Senior lecturer

University Lecturer Nina Reistad MSc, PhD

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

Author

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

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 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.

Department/s

  • Department of Physics

Publishing year

1987-08-01

Language

English

Pages

250-254

Publication/Series

Physica Scripta

Volume

36

Issue

2

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0031-8949