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Sökning: onr:"swepub:oai:DiVA.org:kth-33370" > The FERRUM project :

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00005108naa a2200673 4500
001oai:DiVA.org:kth-33370
003SwePub
008110504s2008 | |||||||||||000 ||eng|
009oai:DiVA.org:su-14409
009oai:portal.research.lu.se:publications/e542dd86-9db0-4c6a-925a-c74e454ee1a6
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-333702 URI
0247 a https://doi.org/10.1051/0004-6361:200790572 DOI
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-144092 URI
0247 a oai:portal.research.lu.se:publications/e542dd86-9db0-4c6a-925a-c74e454ee1a62 URI
040 a (SwePub)kthd (SwePub)sud (SwePub)lu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Hartman, Henriku Lund University4 aut0 (Swepub:lu)6726b122-cc36-4c4f-b619-810a1b0bffa6
2451 0a The FERRUM project :b experimental and theoretical transition rates of forbidden [Sc II] lines and radiative lifetimes of metastable ScII levels
264 c 2008-01-25
264 1b EDP Sciences,c 2008
338 a print2 rdacarrier
500 a QC 20110504
520 a Context. In many plasmas, long-lived metastable atomic levels are depopulated by collisions (quenched) before they decay radiatively. In low-density regions, however, the low collision rate may allow depopulation by electric dipole (E1) forbidden radiative transitions, so-called forbidden lines (mainly M1 and E2 transitions). If the atomic transition data are known, these lines are indicators of physical plasma conditions and used for abundance determination. Aims. Transition rates can be derived by combining relative intensities between the decay channels, so-called branching fractions (BFs), and the radiative lifetime of the common upper level. We use this approach for forbidden [Sc II] lines, along with new calculations. Methods. Neither BFs for forbidden lines, nor lifetimes of metastable levels, are easily measured in a laboratory. Therefore, astrophysical BFs measured in Space Telescope Imaging Spectrograph (STIS) spectra of the strontium filament of Eta Carinae are combined with lifetime measurements using a laser probing technique on a stored ion-beam (CRYRING facility, MSL, Stockholm). These quantities are used to derive the absolute transition rates (A-values). New theoretical transition rates and lifetimes are calulated using the CIV3 code. Results. We report experimental lifetimes of the Sc II levels 3d(2) a(3)P(0,1,2) with lifetimes 1.28, 1.42, and 1.24 s, respectively, and transition rates for lines from these levels down to 3d4s a(3)D in the region 8270-8390 angstrom. These are the most important forbidden [Sc II] transitions. New calculations for lines and metastable lifetimes are also presented, and are in good agreement with the experimental data.
650 7a NATURVETENSKAPx Fysikx Subatomär fysik0 (SwePub)103012 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Subatomic Physics0 (SwePub)103012 hsv//eng
650 7a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics, and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
653 a atomic data
653 a radiation mechanisms : general
653 a methods : laboratory
653 a stars : individual : Eta Carinae
653 a Nuclear physics
653 a Kärnfysik
653 a Physics
653 a fysik
7001 a Gurell, Jonasu Stockholms universitet,Fysikum4 aut0 (Swepub:su)gurell
7001 a Lundin, Peteru Stockholms universitet,Fysikum4 aut0 (Swepub:su)peppe
7001 a Schef, Peteru Stockholms universitet,Fysikum4 aut
7001 a Hibbert, Alan4 aut
7001 a Lundberg, Hansu Atomic Physics,Atomfysik4 aut
7001 a Mannervik, Svenu Stockholms universitet,Fysikum4 aut0 (Swepub:su)mannervi
7001 a Norlin, Lars - Olovu KTH,Kärnfysik4 aut0 (Swepub:kth)u1tzsy2g
7001 a Royen, Pederu Stockholms universitet,Fysikum4 aut0 (Swepub:su)pr
7001 a Lundin, Pontus4 aut
7102 a Lund Universityb Fysikum4 org
7730 t Astronomy and Astrophysicsd : EDP Sciencesg 480:2, s. 575-580q 480:2<575-580x 0004-6361x 1432-0746
8564 u https://www.aanda.org/articles/aa/pdf/2008/11/aa9057-07.pdf
8564 u https://lucris.lub.lu.se/ws/files/3064890/2370243.pdfx primaryx freey FULLTEXT
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33370
8564 8u https://doi.org/10.1051/0004-6361:20079057
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-14409
8564 8u oai:portal.research.lu.se:publications/e542dd86-9db0-4c6a-925a-c74e454ee1a6

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