We report absolute transition frequencies for the allowed transitions from X2?3/2, v? = 0, J? 3/2 rovibronic ground state of 32S1H to A2?+, v? 0 vibronic state. The have been determined with an uncertainty less than 1 MHz, representing a more 1000-fold improvement over previous measurements. Spectral traces are measured by scanning frequency comb stabilized continuous-wave spectroscopy laser mo...

Abstract Hyperfine structures of highly charged ions (HCIs) are favourable spectroscopic targets for exploring fundamental physics along with nuclear properties. Recent proposals HCI atomic clocks highlight their importance, especially many-electron HCIs, and they have been theoretically investigated by refining atomic-structure calculations. However, developments in hyperfine spectroscopy HCIs...

The synthesis and characterization of some new binuclear copper (II) complexes, based on the use of large, pyrole-containing macrocycles, the so called "expanded porphyrins", [Cu2(macrocycle)]+4 is described. Electron Spin Resonance (ESR) studies indicate a weak "half-field line", which is characteristic of the Cu(II)-Cu(II) dimer, is observed at about 1600G. The obser...

Second order magnetic contributions to the hyperfine splitting of the 5snd