Experimental natural lifetime determination of the Ar(II) lower laser levels |
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Authors: | B Van Der Sijde JWH Dielis WPM Graef |
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Institution: | Physics Department, Eindhoven University of Technology, Eindhoven, Netherlands |
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Abstract: | The natural lifetimes of the (3P)4s2P3/2,1/2 levels of the Ar(II) spectrum have been determined from the natural broadening of argon lines, measured with a Fabry—Pérot interferometer. The natural broadening was determined from the lines with wavelengths of 4880 and 4965 Å by comparing them with the lines at 4806 and 5009 Å having negligible natural broadening. The natural lifetime of the 4s2P3/2 level appeared to be τ = 0.19 (±6%) ns and of the 4s2P1/2 level τ = 0.18 (±15%) ns. These values are about 1.5 to 2 times as small as those determined by other authors either experimentally by using a Fabry—Pérot interferometer by the method of Ballik, or calculated using intermediate coupling.The differences between the two experimental methods are discussed. |
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