Progress in laser spectroscopy at radioactive ion beam facilities

Abstract

In the last decade there has been a renaissance in laser spectroscopy at on-line facilities. This has included the introduction of ion traps and the use of laser ion sources to study the hyperfine structure of exotic nuclei far from stability and produce selective enhancement of isomeric beams. In-source spectroscopy has allowed the study of rare isotopes with yields as low as 0.1 atoms per second. In the case of high-resolution spectroscopy, cooling and trapping the ions has dramatically improved the sensitivity. Some elements that were previously inaccessible to laser spectroscopy are now available for study through the technique of in-trap optical pumping. This paper reviews the field of laser spectroscopy at on-line facilities, with an emphasis on new techniques. A summary of experimental data is presented.

β-decay properties of neutron-rich Ge, Se, Kr, Sr, Ru, and Pd isotopes from deformed quasiparticle random-phase approximation

“…From the theoretical side, the equilibrium nuclear shapes in this mass region have been shown to suffer rapid changes as a function of the number of nucleons with competing spherical, axially symmetric prolate and oblate, and triaxial shapes at close energies. Both relativistic [3,4] and nonrelativistic [5][6][7][8][9] approaches agree in the general description of the nuclear structural evolution in this mass region, which is supported experimentally by spectroscopic studies [10][11][12], 2 + lifetime measurements [13][14][15], and quadrupole moments for rotational bands [15], as well as by laser spectroscopy measurements [16].…”

“…Thus, a consistent theoretical description emerges, which is supported by the still scarce experimental information available [2,[10][11][12][13][14][15][16]58].…”

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32Procter1, Billowes2, Bissell3 et al. 2012Phys. Rev. C301210View full textAdd to dashboardCite

“…Laser spectroscopy allows the study of nuclear ground-state (gs) properties with high precision and sensitivity [1]. Analysis of the hyperfine structure and isotope shifts of extensive series of radioactive isotopes can provide model-independent measurements of the nuclear spin, magnetic dipole and electric quadrupole moments, and changes in mean-square charge radii.…”

Collinear Laser Spectroscopy on Neutron-rich Mn Isotopes Approaching $N=40$

“…1 (a). The relative peak positions in the spectrum are correlated through the spin and hyperfine parameters A and B [11]. By comparison with the 55 Mn reference [12], these parameters give direct information on the g-factors and spectroscopic quadrupole moments, A χ 2 minimization procedure was used to analyze the hyperfine spectra.…”