Measured lifetimes of metastable levels of Mn X , Mn XI , Mn XII , and Mn XIII ions
نویسندگان
چکیده
An ion storage technique, based on the capture of metastable multiply charged ions from an external ion source into a Kingdon ion trap, has been used to measure the lifetimes of eight metastable levels of Mn ions with 3s3p configurations, k51 – 4. Although several lifetime calculations exist, some of the transition wavelengths have not been previously observed in any source. The lifetimes range from 1.5–35 ms. A measurement precision as good as 0.9% was obtained in favorable cases. The measured lifetimes are t(Mn X, 3s3p S0)52.160.3, t(Mn X, 3s 3p D2)518.0260.16, t(Mn XI, 3s 3p P3/2)53.0 60.2, t(Mn XI, 3s3p P1/2)56.1760.29, t(Mn XI, 3s 3p D3/2)535.161.43, t(Mn XII, 3s 3p S0) 51.560.2, t(Mn XII, 3s3p D2)511.1660.10, and t(Mn XIII, 3s 3p P3/2)531.3261.82 ms. These results are compared with the existing theoretical calculations, which have estimated uncertainties no better than 25%. @S1050-2947~99!02903-0#
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