Zeitschrift für Physik A Atoms and Nuclei

, Volume 303, Issue 2, pp 97–102 | Cite as

Radiative lifetimes and tensor polarizabilities of 1s4f1F and 1s5f1F level of He I

  • A. S. Aynacioglu
  • G. v. Oppen
  • W. -D. Perschmann
  • D. Szostak
Atoms
Received:

Abstract

He atoms have been excited by Ne+ ion impact and the depolarization of the fluorescence lines at 668 nm and 492 nm by magnetic and electric fields has been studied. The Ne+ ion energy could be chosen such that pure cascade level crossing signals were observed. From the widths of magnetic depolarization signals the radiative lifetimes τ(1s4f1F)=74(2) ns and τ(1s5f1F)=133(5) ns have been determined. By investigating the electric field splitting of the magnetic depolarization signals the tensor polarizabilities ¦αten(1s4f1F)¦=0.58(1) kHz/(V/cm)2 and ¦αten(1s5f1F)¦=4.2(1) kHz/(V/cm)2 have been deduced. From the latter value a mean frequencyv(1s5g−1s5f)=14.4 GHz of the transitions between the levels of the 1s5f configuration and those of the 1s5g configuration has been derived.αten(1s4f1F) depends sensitively on the singlet-triplet mixing in the 1s4f configuration and thus a mixing coefficient could be deduced for this configuration.

Keywords

Elementary Particle Radiative Lifetime Tensor Polarizability Field Splitting Fluorescence Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Wolf, A., Oppen, G.v., Perschmann, W.-D., Szostak, D.: Z. Phys. A — Atoms and Nuclei292, 319 (1979)Google Scholar
  2. 2.
    Szostak, D., Oppen, G.v., Perschmann, W.-D.: Phys. Lett.76 A, 376 (1980)Google Scholar
  3. 3.
    Aynacioglu, A.S., Oppen, G.v., Perschmann, W.-D., Szostak, D.: J. Phys. B At. Mol. Phys.14, 2611 (1981)Google Scholar
  4. 4.
    Oppen, G.v., Perschmann, W.-D., Szostak, D.: Z. Phys. A — Atoms and Nuclei286, 243 (1978)Google Scholar
  5. 5.
    Chang, T.N., Poe, R.T.: Phys. Rev. A14, 11 (1976)Google Scholar
  6. 6.
    Cok, D.R., Lundeen, S.R.: Phys. Rev. A19, 1830 (1979)Google Scholar
  7. 7.
    Buckow, H.H., Heine, G., Reinke, M.: J. Phys. B10, 2347 (1977)Google Scholar
  8. 8.
    Khayrallah, G.A., Smith, S.J.: Phys. Rev. A18, 559 (1978)Google Scholar
  9. 9.
    Bethe, H.A., Salpeter, E.E.: Handbuch Physik35 (1957)Google Scholar
  10. 10.
    Angel, J.R.P., Sanders, P.G.H.: Proc. R. Soc. (London) A305, 125 (1968)Google Scholar
  11. 11.
    Martin, W.C.: J. Phys. Chem. Ref. Data2, 257 (1973)Google Scholar
  12. 12.
    Farley, J.W., MacAdam, K.B., Wing, W.H.: Phys. Rev. A20, 1754 (1979)Google Scholar
  13. 13.
    Deutsch, C.: Phys. Rev. A13, 2311 (1976)Google Scholar
  14. 14.
    Younger, S.M., Wiese, W.L.: Phys. Rev. A17, 1944 (1978)Google Scholar

Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • A. S. Aynacioglu
    • 1
  • G. v. Oppen
    • 1
  • W. -D. Perschmann
    • 1
  • D. Szostak
    • 1
  1. 1.Institut für Strahlungs- und Kernphysik der Technischen UniversitätBerlinGermany

Personalised recommendations