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The FERRUM project :
The FERRUM project : Experimental transition probabilities from highly excited even 5s levels in Cr ii
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- Engström, Lars (författare)
- Department of Physics, Lund University
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- Lundberg, H (författare)
- Department of Physics, Lund University
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- Nilsson, Hampus (författare)
- Lund Observatory, Lund University
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- Hartman, Henrik (författare)
- Malmö högskola,Institutionen för materialvetenskap och tillämpad matematik (MTM),Lund Observatory, Lund University
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- Bäckström, E (författare)
- Department of Physics, Stockholm University
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(creator_code:org_t)
- 2014-10-10
- 2014
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 570
- Relaterad länk:
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https://doi.org/10.1...
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https://mau.diva-por... (primary) (Raw object)
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https://www.aanda.or...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report lifetime measurements of the five levels in the 3d4(a5D)5s e6D term in Cr ii at an energy around 83 000 cm-1, and log(g f ) values for 38 transitions from the investigated levels. The lifetimes are obtained using time-resolved, laser-induced fluorescence on ions from a laser-produced plasma. Since the levels have the same parity as the low-lying states directly populated in the plasma, we used a two-photon excitation scheme. This process is greatly facilitated by the presence of the 3d4(a5D)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 lamp recorded with a Fourier transform spectrometer.
Nyckelord
- atomic data – methods
- laboratory
- atomic – techniques
- spectroscopic
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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