Precision measurement of Mg+25 -ion D1 and D2 …

The authors report the precision measurement of ${}^{25}$Mg${}^{+}$ ion-doublet transition frequencies using a decoherence-assisted spectroscopy method with the full use of spontaneous emission signals to improve the detection sensitivity. The results indicate that consideration of additional physical effects in theoretical calculations, such as the possible capture of electron correlations, is required.