Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

The FERRUM project: Experimental lifetimes and transition probabilities from highly excited even 4d levels in Fe II

In English

Författare

Summary, in English

We report lifetime measurements of the 6 levels in the 3d(6)(5D)4d e(6)G term in Fe II at an energy of 10.4 eV, and f-values for 14 transitions from the investigated levels. The lifetimes were measured using time-resolved laser-induced fluorescence on ions in a laser-produced plasma. The high excitation energy, and the fact that the levels have the same parity as the the low-lying states directly populated in the plasma, necessitated the use of a two-photon excitation scheme. The probability for this process is greatly enhanced by the presence of the 3d(6)(D-5)4p z(6)F levels at roughly half the energy difference. The f-values are obtained by combining the experimental lifetimes with branching fractions derived using relative intensities from a hollow cathode discharge lamp recorded with a Fourier transform spectrometer. The data is important for benchmarking atomic calculations of astrophysically important quantities and useful for spectroscopy of hot stars.

Publiceringsår

2015

Språk

Engelska

Publikation/Tidskrift/Serie

Astronomy & Astrophysics

Volym

584

Dokumenttyp

Artikel i tidskrift

Förlag

EDP Sciences

Ämne

  • Atom and Molecular Physics and Optics

Nyckelord

  • atomic data
  • methods: laboratory: atomic
  • techniques: spectroscopic

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0004-6361