onr:"swepub:oai:DiVA.org:miun-3845"
Search: onr:"swepub:oai:DiVA.org:miun-3845" > Determination of th...
- 1 of 1
- Previous record
- Next record
- To hitlist
Determination of the recombination rate coefficients for Na-like Si IV forming Mg-like Si III
-
- Orban, Istvan, 1980- (author)
- Stockholms universitet,Fysikum,Stockholm University
-
- Glans, Peter (author)
- Mittuniversitetet,Institutionen för teknik, fysik och matematik (-2008)
-
- Altun, Z. (author)
- Marmara University, Istanbul, Turkey
- show more...
- show less...
- (creator_code:org_t)
- 2006-09-12
- 2006
- English.
- In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 459:1, s. 291-296
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Aims. Absolute, total recombination rate coefficients for Si IV were determined using the CRYRING heavy-ion storage ring. Calculated rate coefficients were used to estimate recombination into states that could not be detected in the experiment because of field ionization. Total, as well as separate, radiative and dielectronic plasma recombination rate coefficients were determined. Methods. Stored ions were merged with an expanded electron beam in the electron cooler section of the storage ring. Recombined ions were separated from the stored ion beam in the first dipole magnet after the electron cooler and were detected with unity efficiency. The absolute radiative and dielectronic recombination rate coefficients were obtained over a center-of-mass energy range of 0-20 eV, covering Δ n = 0 core excitations up to the 3s → 3d series limit. The results of an intermediate coupling AUTOSTRUCTURE calculation were compared with the experiment. The theoretical results were also used to estimate the contribution to dielectronic recombination by high Rydberg states, which were not detected because of field ionization. The spectra were convoluted with Maxwell-Boltzmann energy distributions in the 103-10 6 K temperature range. Results. The resulting plasma recombination rate coefficients are presented and compared with theoretical results frequently used for plasma modeling. In the 103-104 K range, a significant underestimation of the calculated dielectronic recombination plasma rate coefficients was observed. Above 3 × 104 K, the agreement between our dielectronic recombination plasma rate coefficients and two of the previously published rate coefficients is better than 20%. Conclusions. The observed differences between the experimental and calculated recombination rate coefficients at low temperatures reflect the need for benchmarking experiments. Our experimentally-derived rate coefficients can guide the development of better theoretical models and lead to more accurately-calculated rate coefficients.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Atomic data
- Atomic processes
- Plasmas
- NATURAL SCIENCES
- NATURVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Astronomy and Astrophysics (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Orban, Istvan, 1 ...
- Glans, Peter
- Altun, Z.
- Lindroth, Eva
- Källberg, Anders
- Schuch, Reinhold
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- Articles in the publication
- Astronomy and As ...
- By the university
- Mid Sweden University
- Stockholm University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
