Oct 3 – 7, 2022
Science Culture Center, IBS
Asia/Seoul timezone

Advances at the CRIS experiment for the laser spectroscopy of short-lived radioactive atoms and molecules

Oct 3, 2022, 2:50 PM
S236 (Science Culture Center, IBS)


Science Culture Center, IBS

55 EXPO-ro, Yuseong-gu, Daejeon
Oral Session Session 3


Mr Michail Athanasakis-Kaklamanakis (CERN, CH-1211 Geneva 23, Switzerland; KU Leuven, B-3001 Leuven, Belgium)


The collinear resonance ionization spectroscopy (CRIS) experiment at the ISOLDE facility at CERN specializes in performing high-sensitivity laser spectroscopy on species with production rates as low as 101-102 nuclei per second. Recently, thanks to the ability of the technique to perform both high-resolution spectroscopy at high precision and low-resolution spectroscopy with a short experimental runtime, the CRIS experiment has expanded its activities to include laser-spectroscopic campaigns on radioactive molecules.

Following the first laser spectroscopy of radium monofluoride (RaF) [1], further CRIS campaigns on beams of short-lived radioactive molecules are being envisioned. Actinium monofluoride (AcF) has been identified as a promising candidate system for the first measurement of a nuclear Schiff moment across the nuclear chart [2], and a CRIS experiment to pin down the electronic structure of AcF for the first time has been planned for the Fall of 2022.

Additionally, to further improve the performance of the CRIS experiment, a voltage-scanning setup has been recently installed, to combine the techniques of frequency and voltage scanning. Commissioning tests with stable beams of Al and Ag have demonstrated that combining the two scanning approaches can accelerate the experimental runtime by a factor of 4 while ensuring that alterations in the ion trajectories are minimized. Additionally, a new laser-ablation ion source based on a radiofrequency ion guide within a gas cell is under construction, aiming to improve the ability of the CRIS experiment to optimize the selection of a laser scheme for atomic and molecular studies.

This contribution will present the recently implemented and planned upgrades at CRIS along with recent results.

[1] R. F. Garcia Ruiz et al., Nature 581 (2020) 396-400.
[2] L. V. Skripnikov et al., Physical Chemistry Chemical Physics 22 (2020) 18374-18380.

Primary author

Mr Michail Athanasakis-Kaklamanakis (CERN, CH-1211 Geneva 23, Switzerland; KU Leuven, B-3001 Leuven, Belgium)


Dr Mark L. Bissell (The University of Manchester, Manchester M13 9PL, United Kingdom) Mia Au (ohannes Gutenberg-Universit ̈at Mainz, Department Chemie, Standort TRIGA, Fritz-Strassmann-Weg 2, 55128 Mainz, Germany) Prof. Anastasia Borschevsky (University of Groningen, 9747 AG Groningen, The Netherlands) Ms Anais Dorne (KU Leuven, B-3001 Leuven, Belgium) Dr Aleksandra A. Kiuberis (University of Groningen, 9747 AG Groningen, The Netherlands) Agota Koszorus (CERN) Dr Adam Vernon (Massachusetts Institute of Technology, Cambridge, MA 02139, USA) Thomas Elias Cocolios (KULeuven) Kieran Flanagan (University of Manchester) Ronald Fernando Garcia Ruiz (MIT) Sarina Geldhof (GANIL/CNRS) Dag Hanstorp (University Gothenbourg) Sonja Kujanpää (University of Jyväskylä) Dr Louis Lalanne (KU Leuven, B-3001 Leuven, Belgium) Gerda Neyens (CERN, KU Leuven) Miranda Nichols (University Gothenbourg) Jordan Reilly (University of Manchester) Mr Andrew J. Smith (The University of Manchester, Manchester M13 9PL, United Kingdom) Dr Quanjun Wang (Lanzhou University, Lanzhou 73000, China) Shane Wilkins (Massachusetts Institute of Technology) Xiaofei Yang (Peking University) Ruben de Groote (KU Leuven) Mr Bram van den Borne (KU Leuven, B-3001 Leuven, Belgium)

Presentation materials