Metastable level in Ni-like ions and time-resolved extreme-ultraviolet observation of Xe ions in an electron beam ion trap.

Nickel-like ions have a metastable level (3d^{9}4s ^{3}D_{3}) that decays exclusively by a magnetic octupole (M3) transition. We earlier have measured the lifetime of this level in isotopically pure Ni-like Xe ions and have shown how hyperfine intera…

Preview only. Read the full abstract at the source