Collinear laser - beam — ion - beam measurement of the mean lifetime of the Ar II 4 p ' F 7 & 2 level
نویسنده
چکیده
The mean lifetime w of the 4p' 'F7/2 level of Ar II has been measured using a variant of the collinear laser-beam —fast-ion-beam spectroscopy technique. Our variant requires no mechanical motion or laser frequency tuning. The result is ~=8.414+0.025 ns in agreement with an earlier, comparably precise, measurement based on a crossed laser —ion-beam technique. The result lies above all theoretical calculations.
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تاریخ انتشار 2011