High-accuracy Measurements of Core-excited Transitions in Light Li-like Ions

Moto Togawa, Steffen Kühn, Chintan Shah +11

The transition energies of the two $1s$-core-excited soft X-ray lines (dubbed q and r) from $1s^{2}2s^1{S}_{1/2}$ to the respective upper levels $1s{(}^{2}S)2s2p{(}^{3}P{)}^2{P}_{3/2}$ an…