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Transition rates in...
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Jönsson, PerMalmö högskola,Teknik och samhälle (TS)
(författare)
Transition rates in the B-, C-, N-, O-, and Ne-like sequences from relativistic CI calculations
- Artikel/kapitelEngelska2011
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European Physical Society,2011
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printrdacarrier
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LIBRIS-ID:oai:DiVA.org:mau-16851
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https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-16851URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:vet swepub-contenttype
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Ämneskategori:kon swepub-publicationtype
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Atomic data are important in astrophysical applications and transition data can be used in the determination of element abundances and plasma diagnostics [1]. To provide for the extensive data needs a number of general computer codes such as SUPERSTRUCTURE, CIV3, and ATSP2K have been developed. As an alternative to these codes, which all rely on the Breit-Pauli approximation, the fully relativistic GRASP2K code [2] can be used. GRASP2K is based on the multicon guration Dirac-Hartree-Fock method and implements a bi-orthogonal transformation method that permits initial and nal states in a transition array to be optimized separately, which, in many cases, leads to more accurate values of the resulting rates [3]. The GRASP2K package also contains modules to compute diagonal and o -diagonal hyper ne interaction constants, isotope shifts, Land e gJ factors, and splittings of magnetic sub-state in intermediate and strong magnetic elds. In this work, GRASP2K has been applied to provide highly accurate spectroscopic data for transitions in the B-, C-, N-, O-, and Ne-like sequences [4]. Valence, core-valence, and core-core correlation e ects were accounted for through SD-MR expansions to increasing sets of active orbitals. The calculated energy levels generally agree to within a few hundred cm with the experimentally compiled results. Babushkin (length) and Coulomb (velocity) forms of transition rates di er with less than 1% for the majority of the allowed transitions. The perspectives of massive data production on parallel clusters to cover the needs of the astrophysical community is discussed.
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Gustafsson, StefanMalmö högskola,Teknik och samhälle (TS)(Swepub:mau)tsstgu
(författare)
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Ekman, JörgenMalmö högskola,Teknik och samhälle (TS)(Swepub:mau)tsjoek
(författare)
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Bengtsson, Peter
(författare)
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Rynkun, Pavel
(författare)
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Gaigalas, Gediminas
(författare)
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Malmö högskolaTeknik och samhälle (TS)
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Abstracts 43rd Conference of the European Group for Atomic Systems (EGAS): European Physical Society, s. 142-142
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