eprintid: 10064
rev_number: 56
eprint_status: archive
userid: 599
dir: disk0/00/01/00/64
datestamp: 2008-09-11 11:41:10
lastmod: 2021-10-10 23:19:00
status_changed: 2008-09-11 11:41:10
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Storey, PJ
creators_name: Del Zanna, G
creators_name: Mason, HE
creators_name: Zeippen, CJ
title: Atomic data from the IRON project - LVIII. Electron impact excitation of Fe XII
subjects: 11200
subjects: 11000
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
keywords: atomic data, Sun : corona, techniques : spectroscopic, EXTREME-ULTRAVIOLET SPECTRUM, FINE-STRUCTURE TRANSITIONS, LINE INTENSITY RATIOS, SOLAR ACTIVE-REGION, GROUND CONFIGURATION, CROSS-SECTIONS, IDENTIFICATIONS, ASTROPHYSICS, SERTS-95, CORONA
abstract: A new calculation of rate coefficients for electron collisional excitation of Fe XII is presented and compared to earlier calculations. Significant differences are found with all earlier work due to the inclusion of resonance processes that have not previously been considered and to the use of the intermediate coupling frame transformation method. The resulting dataset of collision strengths is shown to resolve many of the outstanding discrepancies between theory and solar observations. In particular, density sensitive line ratios in Fe XII now indicate electron densities close to those derived from other ions of comparable ionization potential.
date: 2005-04
publisher: E D P SCIENCES
vfaculties: VMPS
rae2008: 19
oa_status: green
primo: open
primo_central: open_green
article_type_text: Article
verified: verified_batch
elements_source: Web of Science
elements_id: 22876
doi: 10.1051/0004-6361:20041771
lyricists_name: Storey, Peter
lyricists_id: PJSTO59
full_text_status: public
publication: ASTRON ASTROPHYS
volume: 433
number: 2
pagerange: 717 - 730
refereed: TRUE
issn: 0004-6361
citation:        Storey, PJ;    Del Zanna, G;    Mason, HE;    Zeippen, CJ;      (2005)    Atomic data from the IRON project - LVIII. Electron impact excitation of Fe XII.                   ASTRON ASTROPHYS , 433  (2)   717 - 730.    10.1051/0004-6361:20041771 <https://doi.org/10.1051/0004-6361%3A20041771>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10064/1/10064.pdf