Achieving sensitive, high-resolution laser spectroscopy at CRIS

Abstract

The Collinear Resonance Ionization Spectroscopy (CRIS) experiment, located at the ISOLDE facility, has recently performed high-resolution laser spectroscopy, with linewidths down to 20 MHz. In this article, we present the modifications to the beam line and the newly-installed laser systems that have made sensitive, high-resolution measurements possible. Highlights of recent experimental campaigns are presented.

Collinear laser spectroscopy at ISOLDE: new methods and highlights

“…A 200Hz Nd:YAG laser system is used for schemes which require a non-resonant ionisation step. Details on the lasers can be found in [95].…”

Characterization of a pulsed injection-locked Ti:sapphire laser and its application to high resolution resonance ionization spectroscopy of copper

“…The developments and the spectroscopy discussed here have been carried out at the IGISOL facility in the Accelerator Laboratory of the University of Jyväskyä [14]. The system presented here has so far already been employed at the LISOL facility in Belgium [7,12] and the CRIS laboratory at ISOLDE/ CERN [13]. Furthermore off-line studies of several long-lived actinides (Th, Pu, Ac) have been performed in the LARISSA laboratory at the University of Mainz [14,15].…”

Laser-spectroscopy studies of the nuclear structure of neutron-rich radium

“…They were then accelerated to 30 keV and mass separated with the highresolution separator. The ions were then cooled and bunched using the ISOLDE linear Paul trap, ISCOOL, re-accelerated to 30 keV and deflected through the CRIS beamline [19,20]. After passing the Ra + beam through a potassium-vapor chargeexchange cell for neutralization (with an efficiency of up to 60%), the remaining ionic component was deflected away.…”

“…The laser-ionized ions were deflected through 20 • and detected by a Hamamatsu F-4655-12 microchannel plate, biased at −2.4 kV. The combined transmission and detection efficiency of the microchannel plate was determined to be 32% [20].…”