期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 312, 期 4, 页码 813-816出版社
WILEY-BLACKWELL
DOI: 10.1046/j.1365-8711.2000.03184.x
关键词
atomic data; line : formation; techniques : spectroscopic; HII regions; planetary nebulae : general
The magnetic-dipole probabilities for the (1)D(2)-(3)P(2) and (1)D(2)-(3)P(1) transitions in carbon-like and oxygen-like ions are calculated up to atomic number Z = 12, including relativistic corrections to the magnetic dipole operator. The ratio of the probabilities for these two transitions is found to change by up to 5 per cent compared with previous theoretical work, none of which included these relativistic corrections, with the effect being largest for the near neutral ions. The transition probability ratio for the [O III] 5007 and 4959 Angstrom lines is found to be 3.01, implying an intensity ratio of 2.98, in significantly better agreement with the observed ratio than the earlier theoretical work.
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