The electron-impact broadening parameters for Co III spectral lines
نویسندگان
چکیده
منابع مشابه
Core-polarization Effects for the Stark Broadening of Pb III Spectral Lines: Predictions and Regularities
Using a semi-classical approach, we have calculated values of the Stark broadening parameters for several lines of Pb III. Stark widths and shifts are presented for an electron density of 1017 cm– 3 and temperatures T = 11000-100000 K. In this work, we have carried out a study of the influence of the introduction of the terms that allow us to take into account the Core Polarization (CP) effects...
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The electron-impact widths and shifts for six Eu ii lines and widths for three La ii, and six La iii multiplets have been calculated by using the modified semiempirical method. Estimation for Stark widths of 664.506 nm (Eu ii) and 666.634 nm (Eu iii) lines are given as well. The influence of the electron-impact mechanism on line shapes and equivalent widths in hot star atmospheres has been cons...
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The half-widths of five A III and two A I V lines have been measured in a pulsed arc operated in an argon-nitrogen mixture. Electron densities of 3.8 to 8.0 x 1016 c m 3 were determined by laser interferometry at a single wavelength while electron temperatures from 20750° to 23100 ° K were measured from the relative intensities of A l l lines. The experimental A III and A I V Stark profile half...
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Recent experimental and theoretical (both improved semiclassical and fully quantum-mechanical) line broadening calculations for B III and NeVII ∆n = 0 transitions with n = 2 and 3, respectively, are discussed. The disagreements by about a factor of 2 between the fully quantum-mechanically calculated and both measured and semiclassically calculated widths can be explained in terms of violations ...
متن کاملOn the Stark broadening of the B III 2s− 2p lines
We present a quantum-mechanical calculation of Stark line widths from electron-ion collisions for the 2s1/2−2p1/2,3/2, λ = 2066 and 2067 Å, resonance transitions in B III. The results confirm the previous quantum-mechanical Rmatrix calculations but contradict recent measurements and semi-classical and some semi-empirical calculations. The differences between the calculations can be attributed t...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2003
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20021801