Calculated hyperfine spectra for in-source laser spectroscopy and deduced magnetic moments and isomer shifts of $^{68}\mathrm{Cu}$ and $^{70}\mathrm{Cu}$ isomeric states

Calculated hyperfine spectra for in-source laser spectroscopy and deduced magnetic moments and isomer shifts of ${}^{68}{Cu}$ and ${}^{70}{Cu}$ isomeric states

S. Gheysen, G. Neyens, and J. Odeurs

Phys. Rev. C 69, 064310 – Published 8 June 2004

Abstract

The rate at which nuclei are produced in a multistep laser ionization process is calculated as a function of the resonant laser excitation frequency. The model enables the fitting of the hyperfine spectra obtained by resonantly exciting and ionizing beams of (short-lived) nuclei. The fit parameters are the nuclear dipole and quadrupole moments, an isotope/isomer shift and the laser powers. The dressed-states approach for the interaction of laser light with an ensemble of atoms and the influence of the ionizing step as an irreversible process in a two-level system allow a very clear understanding of the physical process. In addition, it is seen that the yield of the on-resonance produced ions is sensitive to the angular momenta of the electron levels and to the nuclear spin.