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The FERRUM project :
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Engström, LarsDepartment of Physics, Lund University
(författare)
The FERRUM project : Experimental transition probabilities from highly excited even 5s levels in Cr ii
- Artikel/kapitelEngelska2014
Förlag, utgivningsår, omfång ...
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2014-10-10
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EDP Sciences,2014
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electronicrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:mau-16018
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https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-16018URI
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https://doi.org/10.1051/0004-6361/201424762DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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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.
Ämnesord och genrebeteckningar
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atomic data – methods
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laboratory
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atomic – techniques
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spectroscopic
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Lundberg, HDepartment of Physics, Lund University
(författare)
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Nilsson, HampusLund Observatory, Lund University(Swepub:mau)ak4581
(författare)
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Hartman, HenrikMalmö högskola,Institutionen för materialvetenskap och tillämpad matematik (MTM),Lund Observatory, Lund University(Swepub:mau)tsheha
(författare)
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Bäckström, EDepartment of Physics, Stockholm University
(författare)
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Department of Physics, Lund UniversityLund Observatory, Lund University
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Astronomy and Astrophysics: EDP Sciences5700004-63611432-0746
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