Abstract
Collisional broadenings and shifts of profiles have been investigated for the following emission lines: 5889.95 A Na, 4047.20 A K, 4226.73 A Ca, 3273.96 A Cu, and 4030.76 A Mn in an air-acetylene flame. The Lorentz widths δλ L at half-maximum intensity, the shifts δλ s , and the ratio η ≡δλ L /δλ s were determined experimentally. The values of C 6 in the Lennard-Jones (LJ) potential were calculated from a Coulomb approximation. For the LJ-potential, δλ c ,δλ s and the repulsive constants C 12 were calculated from η exp, C 6 and compared with experiments. A method is proposed for η<2.78 to obtain suitable values of the broadening parameters. We recommend calculation of the total potential function because the LJ-potential may not be suitable for all systems, particularly when η<2.78. The natural (δλ N ) and quenching (δλ q ) widths were calculated and used as correction factors.
Published Version
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