E. Trabert et al., EXPERIMENTAL N=3 LEVEL LIFETIMES OF NA-LIKE HEAVY-IONS IN THE REALM OF MASSIVE RELATIVISTIC EFFECTS, Physics letters. A, 188(4-6), 1994, pp. 355-360
The lifetimes of the 3p 2P(o) resonance levels and of the 3d 2D levels
in Na-like ions Xe43+ (Z=54) and Au68+ (Z=79) have been measured by t
ime-resolved spectroscopy of foil-excited ion beams. This represents a
major step beyond the previous data which reached only up to Z = 29,
into the range with massive relativistic effects. The results corrobor
ate the lifetimes predicted by very recent calculations of the atomic
structure which also reproduce the experimental transition wavelengths
.