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

DSpace Repository

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

Show full item record

Files for download

Facebook

Simple item record

Publication Article, peer reviewed scientific
Title The FERRUM project : Experimental lifetimes and transition probabilities from highly excited even 4d levels in Fe ii
Author(s) Hartman, Henrik ; Nilsson, Hampus ; Engström, L ; Lundberg, H
Date 2015
English abstract
We report lifetime measurements of the 6 levels in the 3d6(5D)4d e6G 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 laserproduced 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 3d6(5D)4p z6F levels at roughly half the energy di erence. 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.
DOI http://dx.doi.org/10.1051/0004-6361/201525738 (link to publisher's fulltext)
Publisher EDP Sciences
Host/Issue Astronomy and Astrophysics;A24
Volume 584
ISSN 0004-6361
Pages 1-6
Language eng (iso)
Subject(s) atomic data methods
laboratory
atomic techniques
spectroscopic
Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/19880 (link to this page)

This item appears in the following Collection(s)

Show full item record

Search


Browse

My Account

Statistics