Intra-cavity laser resonance spectroscopy of hydrogen-like silicon ions

Discrepancies in quantum electro-dynamics

“…There has been excellent work developing laser resonance experiments at accelerators, and recently at EBITs (Lea et al, 1994;von Brentano et al, 1993;Myers et al, 1995;Klein et al, 2001). Part of this area has been reviewed recently (Myers, 2001).…”

Hydrogenic systems, frequency standards and fundamental constants

“…In this type of experiment the signal for a given laser intensity scales as Z -6 , while the background (which arises from the two-photon decay of the metastable 2S 1/2 level) scales as Z 6 [128]. Although the 2S Lamb shift in hydrogen-like silicon has been observed using continuous-wave (CW) radiation [129], to obtain sufficient signal-to-background with a CW laser it is advantageous to study a lower-Z system. The drawback is that the sensitivity to the higher-order QED corrections is reduced, but the overall signal rate is greatly increased and the characterization of the laser -ion interaction region is significantly simpler.…”