Dec 5 – 7, 2011
Europe/Zurich timezone

Laser assisted decay spectroscopy at the CRIS beam line

Dec 6, 2011, 5:50 PM
503/1-001 - Council Chamber (CERN)

503/1-001 - Council Chamber


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Submitted Heavy nuclei


Kara Lynch (University of Manchester (GB))


The new Collinear Resonant Ionization Spectroscopy (CRIS) experiment at ISOLDE will use laser radiation to stepwise excite and ionize an atomic beam for the purpose of ultra-sensitive detection of rare isotopes, and hyperfine structure measurements. The technique also offers the ability to purify an ion beam that is heavily contaminated with radioactive isobars, including the ground state of an isotope from its isomer, which allows for sensitive secondary experiments to be performed. A new program aiming to use the CRIS technique to select only nuclear isomeric states for decay spectroscopy has commenced this year. The isomeric ion beam is selected using a resonance of its hyperfine structure. It is then deflected to a spectroscopy station, consisting of a rotating wheel implantation system for alpha and beta decay spectroscopy, and three high purity germanium detectors around the implantation site for gamma-ray detection. Laser spectroscopy will provide a measurement of the spin of the ground and isomeric states in the parent nucleus, while the level structure of the daughter nucleus will come from the complementary decay spectroscopy. Here we report the current status of the Laser Assisted Decay Spectroscopy set-up for the CRIS beam line. A case study of 204Fr is presented, along with recent tests carried out on the system.

Primary authors

Kara Lynch (University of Manchester (GB)) Mustafa Rajabali (Katholieke Universiteit Leuven)


Andrew Smith (University of Manchester) Bradley Cheal (The University of Manchester) Bruce Marsh (CERN) Francois Le Blanc (Inst. Nat. Phys. Nucl. & Particules (IN2P3)-Universite de Paris-) Dr Gary Simpson (LPSC) Gerda Neyens (Katholieke Universiteit Leuven) Prof. Hinko Henry Stroke (New York University (US)) Jonathan Billowes (University of Manchester) Kieran Flanagan (University of Manchester (GB)) Klaus Wendt (Johannes Gutenberg Universitat, Mainz) Koen Dewolf (Katholieke Universiteit Leuven) Mark Bissell (Katholieke Universiteit Leuven (BE)) Masaki Hori (Max-Planck Institute of Quantum Optics (DE)) Pieter Vingerhoets (Katholieke Universiteit Leuven) Sebastian Rothe (Johannes-Gutenberg-Universitaet Mainz (DE)) Stijn De Schepper (Katholieke Universiteit Leuven) Takumi Kobayashi (The University of Tokyo) Thomas Elias Cocolios (CERN) Thomas Procter (University of Manchester)

Presentation materials