The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform
Wilfried Nörtershäuser - One of the best experts on this subject based on the ideXlab platform.
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A $4\pi$ Fluorescence Detection Region for Collinear Laser Spectroscopy
arXiv: Instrumentation and Detectors, 2020Co-Authors: B. Maaß, Kristian König, J. Krämer, Andrew J. Miller, Kei Minamisono, Wilfried Nörtershäuser, Felix SommerAbstract:We report on a novel detection system for collinear Laser Spectroscopy which provides an almost $4\pi$ solid angle for fluorescence photon detection by employing curved surface mirrors. Additional parabolic angular filters offer passive stray light suppression and can be configured to match the experimental conditions. The mirror surfaces have an excellent reflectivity over a broad band of wavelengths in the optical spectrum and can be substituted to expand the wavelength acceptance range even further. Experiments with this system were performed at two collinear Laser Spectroscopy setups, including the Laser spectroscopic investigation of $^{36}$Ca using rates of 25/s at NSCL, MSU.
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High-precision collinear Laser Spectroscopy at the Collinear Apparatus for Laser Spectroscopy and Applied Physics (COALA)
Hyperfine Interactions, 2020Co-Authors: Phillip Imgram, B. Maaß, Kristian König, J. Krämer, Felix Sommer, Tim Ratajczyk, Patrick Müller, Wilfried NörtershäuserAbstract:COALA is a new offline collinear Laser Spectroscopy setup for high-precision measurements and development work at TU Darmstadt, Germany. An introduction to the technique and the experimental setup is given and an overview of current projects with recent results is presented. The idea of a novel all-optical absolute charge radius determination is discussed.
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Laser Spectroscopy at storage rings
Physica Scripta, 2015Co-Authors: Wilfried Nörtershäuser, Rodolfo SánchezAbstract:We provide a brief overview on the infrastructure required for Laser spectroscopic experiments at magnetic storage rings and summarize some recent results on Laser Spectroscopy at the ESR. New opportunities at the high-energy storage ring at FAIR are also highlighted.
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Laser Spectroscopy at the experimental storage ring - an overview
Journal of Physics: Conference Series, 2012Co-Authors: Danyal Winters, Wilfried Nörtershäuser, T. Kuhl, Th. StöhlkerAbstract:We present an overview of Laser Spectroscopy experiments at the experimental storage ring of GSI in Darmstadt, which have been and will be performed in the near future.
Bradley Cheal - One of the best experts on this subject based on the ideXlab platform.
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Collinear Laser Spectroscopy techniques at JYFL
Hyperfine Interactions, 2012Co-Authors: Bradley Cheal, D. H. ForestAbstract:Over the last 15 years, a collinear Laser Spectroscopy programme has been developed at the University of Jyvaskyla Accelerator Laboratory (JYFL), Finland. Continuous technique development and exploitation has taken place to address physics cases inaccessible elsewhere. In particular, the use of ion beams from the IGISOL and the pioneering application of cooled and bunched beams to Laser Spectroscopy. Many of these advances have additionally now been exported to facilities worldwide.
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Physics highlights from Laser Spectroscopy at the IGISOL
Hyperfine Interactions, 2012Co-Authors: D. H. Forest, Bradley ChealAbstract:Laser Spectroscopy provides model-independent access to a variety of radioactive nuclear ground state and isomeric state properties. These include the nuclear moments, changes in mean-square charge radii, and direct measurements of the nuclear spin. At the IGISOL laboratory, the collinear Laser Spectroscopy programme is able to access cases, such as refractory elements and short-lived states, not available at conventional facilities. A summary of physics highlights is presented here.
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Progress in Laser Spectroscopy at radioactive ion beam facilities
Journal of Physics G: Nuclear and Particle Physics, 2010Co-Authors: Bradley Cheal, Kieran FlanaganAbstract: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.
J. Billowes - One of the best experts on this subject based on the ideXlab platform.
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decay assisted Laser Spectroscopy of neutron deficient francium
Physical Review X, 2014Co-Authors: K M Lynch, M L Bissell, T E Cocolios, V N Fedosseev, K T Flanagan, Stijn De Schepper, R. P. De Groote, I. Budinčević, J. Billowes, S. FranchooAbstract:This paper reports on the hyperfine-structure and radioactive-decay studies of the neutron-deficient francium isotopes 202–206 Fr performed with the Collinear Resonance Ionization Spectroscopy (CRIS) experiment at the ISOLDE facility, CERN. The high resolution innate to collinear Laser Spectroscopy is combined with the high efficiency of ion detection to provide a highly sensitive technique to probe the hyperfine structure of exotic isotopes. The technique of decay-assisted Laser Spectroscopy is presented, whereby the isomeric ion beam is deflected to a decay-Spectroscopy station for alpha-decay tagging of the hyperfine components. Here, we present the first hyperfine-structure measurements of the neutron-deficient francium isotopes 202–206 Fr, in addition to the identification of the low-lying states of 202;204 Fr performed at the CRIS experiment.
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Laser Spectroscopy of stable Os isotopes
Hyperfine Interactions, 2006Co-Authors: M Avgoulea, J. Billowes, D. H. Forest, Paul Campbell, Jussi Huikari, Ari Jokinen, M. Mahgoub, A. Ezwam, M. D Gardner, A. NieminenAbstract:Doppler-free isotope shift measurements of the stable even 184–192Os and 187,189Os odd isotopes have been performed for the first time on the 5d 66s 2 5D4→5d 66s6p 7F4 (305.9 nm) transition in the neutral atom by atomic beam Laser Spectroscopy and on the ionic 5d 66s 5D9/2→5d 66p 6D7/2 (228.2 nm) transition by fast collinear ion-Laser Spectroscopy. The measurements were carried out in Manchester and at the IGISOL facility in Jyvaskyla in Finland, respectively. The results presented are the most precise measurements to-date of the absolute isotope shifts.
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Laser Spectroscopy Programme at the Jyväskylä IGISOL
Hyperfine Interactions, 2006Co-Authors: J. BillowesAbstract:This paper reviews the status of the Laser Spectroscopy programme being carried using the IGISOL mass separator in combination with an RFQ cooler-buncher. Measurements in the zirconium region are being extended to the yttrium isotopes. Two K = 8 isomers, in 176Yb and 130Ba, are found to have smaller mean square charge radii than their ground states, and the isotope shifts of stable osmium isotopes have been measured off-line by collinear Laser Spectroscopy.
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Developments in Laser Spectroscopy at the Jyväskylä IGISOL
The European Physical Journal A, 2005Co-Authors: J. BillowesAbstract:This paper describes the programme of work on Laser Spectroscopy of radioactive atoms being carried out at the IGISOL facility by a Birmingham-Jyväskylä-Manchester collaboration. The advantageous features of the ion guide ion source, combined with an ion beam cooler-buncher allows a broad range of studies to be pursued. Highlighted in this presentation are collinear beams Laser spectroscopic measurements on Zr and Y isotopes, and charge radii determinations for two 8- isomers in 130Ba and 176Yb. A Laser ion source capability called FURIOS is being developed for the IGISOL which will not only provide isobarically pure beams for experiments, but also allow in-source Laser Spectroscopy of short-lived isomers of heavy elements
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Collinear Laser Spectroscopy of ZrII
Exotic Nuclei and Atomic Masses, 2003Co-Authors: D. H. Forest, J. Billowes, Paul Campbell, Peter Dendooven, Kieran Flanagan, J A R Griffith, Jussi Huikari, Ari Jokinen, Iain Moore, R. MooreAbstract:A new technique involving collinear Laser Spectroscopy of ion bunches has been used to study the radio-isotopes 87,87m,88,89,89m Zr.
Felix Sommer - One of the best experts on this subject based on the ideXlab platform.
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A $4\pi$ Fluorescence Detection Region for Collinear Laser Spectroscopy
arXiv: Instrumentation and Detectors, 2020Co-Authors: B. Maaß, Kristian König, J. Krämer, Andrew J. Miller, Kei Minamisono, Wilfried Nörtershäuser, Felix SommerAbstract:We report on a novel detection system for collinear Laser Spectroscopy which provides an almost $4\pi$ solid angle for fluorescence photon detection by employing curved surface mirrors. Additional parabolic angular filters offer passive stray light suppression and can be configured to match the experimental conditions. The mirror surfaces have an excellent reflectivity over a broad band of wavelengths in the optical spectrum and can be substituted to expand the wavelength acceptance range even further. Experiments with this system were performed at two collinear Laser Spectroscopy setups, including the Laser spectroscopic investigation of $^{36}$Ca using rates of 25/s at NSCL, MSU.
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High-precision collinear Laser Spectroscopy at the Collinear Apparatus for Laser Spectroscopy and Applied Physics (COALA)
Hyperfine Interactions, 2020Co-Authors: Phillip Imgram, B. Maaß, Kristian König, J. Krämer, Felix Sommer, Tim Ratajczyk, Patrick Müller, Wilfried NörtershäuserAbstract:COALA is a new offline collinear Laser Spectroscopy setup for high-precision measurements and development work at TU Darmstadt, Germany. An introduction to the technique and the experimental setup is given and an overview of current projects with recent results is presented. The idea of a novel all-optical absolute charge radius determination is discussed.
K. Meier - One of the best experts on this subject based on the ideXlab platform.
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Laser systems specialized for Laser Spectroscopy at storage rings
Hyperfine Interactions, 1997Co-Authors: T. Engel, M. Würtz, Stefan Borneis, St. Becker, I. Klaft, A. Kohl, T. Kuhl, Franco Laeri, D. Marx, K. MeierAbstract:Laser Spectroscopy at storage rings often suffers from a limited resolution due to Doppler-broadened resonances. Broadening is caused by the velocity spread of the ions stored in the beam. In the following, the present status of our work on Laser systems specialized on the specific needs of Laser Spectroscopy at storage rings is reported.
