High-resolution laser resonance ionization spectroscopy of $$^{143-147}$$Pm

Abstract

We present the results of high-resolution laser spectroscopy of the long-lived radioactive isotopes 143−147 Pm. The hyperfine structures and isotope shifts in two different atomic ground-state transitions at 452 nm and 468 nm were probed by in-source laser spectroscopy at the RISIKO mass separator in Mainz, using the PI-LIST ion source. From the hyperfine coupling constants the nuclear magnetic dipole and electric quadrupole moments for 143−147 Pm were derived, and the measured isotope shifts allowed the extraction of changes in nuclear mean square charge radii.

On the performance of wavelength meters: Part 1—consequences for medium-to-high-resolution laser spectroscopy

“…[24]. More information on the laser setup can be found in [25]. Here, the light from the probe ECDL and from a stabilized HeNe laser (SL-03, SIOS Messtechnik GmbH) is overlapped in a custombuilt confocal SFPI, with a piezo-actuated mirror.…”

Exotic Radionuclides – What are they good for?

“…the neutron capture cross section measurements of 63 Ni, [44] 171 Tm and 147 Pm at n_TOF (CERN, Switzerland) and SARAF (SOREQ, Israel), respectively, [45,48] as well as the determination of the atomic transitions and the first ionization potential of promethium at University Mainz (Germany). [46]…”

In‐Source High‐Resolution Spectroscopy Using an Integrated Tunable Raman Laser

“…With the optimal positioning of the laser beams this volume corresponds to a narrow (3 mm diameter) cylinder located centrally on axis with the atom beam, close to the exit of the hot cavity. The technique has been successfully used in the past for nuclear structure investigations via hyperfine structure analysis of 97-99 Tc, [51] 143-147 Pm, [52] and [249][250][251][252][253] Cf. [53] The PI-LIST version employed in this work is identical to the units recently adapted for ISOLDE operation, featuring the perpendicular laser access by internal metal mirror surfaces.…”