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Verlinde M, Ferrer R, Claessens A, Granados CA, Kraemer S, Kudryavtsev Y, Li D, Van den Bergh P, Van Duppen P, Verstraelen E. Single-longitudinal-mode pumped pulsed-dye amplifier for high-resolution laser spectroscopy. Rev Sci Instrum 2020; 91:103002. [PMID: 33138596 DOI: 10.1063/5.0017985] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 09/26/2020] [Indexed: 06/11/2023]
Abstract
The In-Gas-jet Laser Ionization and Spectroscopy (IGLIS) technique relies on narrow-bandwidth, high-peak-power, short-pulse-length (≈10 ns), and high-repetition-rate laser pulses to probe, precisely and efficiently, the hyperfine structure of medium-heavy and heavy isotopes, embedded in a supersonic jet. The power and repetition rate requirements of the laser system are met by combining ≈100 W, 8 ns pulse width, 10 kHz commercial Nd:YAG pump lasers with a single-mode continuous wave seeded Pulsed Dye Amplifier (PDA). The common multi-longitudinal-mode operation of these Nd:YAG pump lasers causes, however, undesirable frequency sidebands in the output spectrum of the PDA system, hindering the attainable spectral resolution, a correct interpretation, and an accurate analysis of the hyperfine spectra. In this article, a new prototype Nd:YAG laser is presented, which combined with the PDA system is capable of providing quasi-transform-limited laser pulses at 10 kHz, with only limited losses in laser power. This system reduces any spectral sideband amplitude below a proven upper limit of 0.2% with one order of magnitude extra reduction expected based on simulations. A full characterization of both the Nd:YAG and PDA laser systems is done by studying the temporal and frequency behavior in detail. This study is finalized by a performance benchmark of this combined laser system in the hyperfine spectroscopy of copper isotopes, showcasing its applicability for future IGLIS studies.
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Affiliation(s)
- M Verlinde
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - R Ferrer
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - A Claessens
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - C A Granados
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - S Kraemer
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - Yu Kudryavtsev
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - D Li
- Edgewave GmbH, Carlo-Schmid-Str. 19, 52146 Würselen, Germany
| | - P Van den Bergh
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - P Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
| | - E Verstraelen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
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Ferrer R, Barzakh A, Bastin B, Beerwerth R, Block M, Creemers P, Grawe H, de Groote R, Delahaye P, Fléchard X, Franchoo S, Fritzsche S, Gaffney LP, Ghys L, Gins W, Granados C, Heinke R, Hijazi L, Huyse M, Kron T, Kudryavtsev Y, Laatiaoui M, Lecesne N, Loiselet M, Lutton F, Moore ID, Martínez Y, Mogilevskiy E, Naubereit P, Piot J, Raeder S, Rothe S, Savajols H, Sels S, Sonnenschein V, Thomas JC, Traykov E, Van Beveren C, Van den Bergh P, Van Duppen P, Wendt K, Zadvornaya A. Towards high-resolution laser ionization spectroscopy of the heaviest elements in supersonic gas jet expansion. Nat Commun 2017; 8:14520. [PMID: 28224987 PMCID: PMC5322538 DOI: 10.1038/ncomms14520] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 01/09/2017] [Indexed: 11/09/2022] Open
Abstract
Resonant laser ionization and spectroscopy are widely used techniques at radioactive ion beam facilities to produce pure beams of exotic nuclei and measure the shape, size, spin and electromagnetic multipole moments of these nuclei. However, in such measurements it is difficult to combine a high efficiency with a high spectral resolution. Here we demonstrate the on-line application of atomic laser ionization spectroscopy in a supersonic gas jet, a technique suited for high-precision studies of the ground- and isomeric-state properties of nuclei located at the extremes of stability. The technique is characterized in a measurement on actinium isotopes around the N=126 neutron shell closure. A significant improvement in the spectral resolution by more than one order of magnitude is achieved in these experiments without loss in efficiency.
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Affiliation(s)
- R Ferrer
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - A Barzakh
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
| | - B Bastin
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - R Beerwerth
- Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany.,Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany
| | - M Block
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.,Helmholtz Institute Mainz, 55099 Mainz, Germany.,Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, Fritz-Strassmann-Weg 2, 55128 Mainz, Germany
| | - P Creemers
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - H Grawe
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - R de Groote
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - P Delahaye
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - X Fléchard
- Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - S Franchoo
- Institute de Physique Nucléaire (IPN) d'Orsay, 91406 Orsay Cedex, France
| | - S Fritzsche
- Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany.,Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany
| | - L P Gaffney
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - L Ghys
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium.,SCK·CEN, Belgian Nuclear Research Center, Boeretang 200, 2400 Mol, Belgium
| | - W Gins
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - C Granados
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - R Heinke
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
| | - L Hijazi
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - M Huyse
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - T Kron
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
| | - Yu Kudryavtsev
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - M Laatiaoui
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.,Helmholtz Institute Mainz, 55099 Mainz, Germany
| | - N Lecesne
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - M Loiselet
- Université catholique de Louvain, Centre de Ressources du Cyclotron, B-1348 Louvain-la-Neuve, Belgium
| | - F Lutton
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - I D Moore
- Department of Physics, University of Jyväskylä, PO Box 35 (YFL), Jyväskylä FI-40014, Finland
| | - Y Martínez
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium.,CERN, CH-1211 Genève, Switzerland
| | - E Mogilevskiy
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium.,Faculty of Mechanics and Mathematics, Lomonosov Moscow State University, Leninskie gory, 1, 119992 Moscow, Russia
| | - P Naubereit
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
| | - J Piot
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - S Raeder
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - S Rothe
- CERN, CH-1211 Genève, Switzerland
| | - H Savajols
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - S Sels
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - V Sonnenschein
- Department of Physics, University of Jyväskylä, PO Box 35 (YFL), Jyväskylä FI-40014, Finland
| | - J-C Thomas
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - E Traykov
- GANIL, CEA/DRF-CNRS/IN2P3, B.P. 55027, 14076 Caen Cedex 05, France
| | - C Van Beveren
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - P Van den Bergh
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - P Van Duppen
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
| | - K Wendt
- Institut für Physik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
| | - A Zadvornaya
- KU Leuven, Instituut voor Kern-en Stralingsfysica, Celestijnenlaan 200D, B-3001 Leuven, Belgium
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Cocolios TE, Dexters W, Seliverstov MD, Andreyev AN, Antalic S, Barzakh AE, Bastin B, Büscher J, Darby IG, Fedorov DV, Fedosseyev VN, Flanagan KT, Franchoo S, Fritzsche S, Huber G, Huyse M, Keupers M, Köster U, Kudryavtsev Y, Mané E, Marsh BA, Molkanov PL, Page RD, Sjoedin AM, Stefan I, Van de Walle J, Van Duppen P, Venhart M, Zemlyanoy SG, Bender M, Heenen PH. Early onset of ground state deformation in neutron deficient polonium isotopes. Phys Rev Lett 2011; 106:052503. [PMID: 21405388 DOI: 10.1103/physrevlett.106.052503] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Indexed: 05/30/2023]
Abstract
In-source resonant ionization laser spectroscopy of the even-A polonium isotopes (192-210,216,218)Po has been performed using the 6p(3)7s (5)S(2) to 6p(3)7p (5)P(2) (λ=843.38 nm) transition in the polonium atom (Po-I) at the CERN ISOLDE facility. The comparison of the measured isotope shifts in (200-210)Po with a previous data set allows us to test for the first time recent large-scale atomic calculations that are essential to extract the changes in the mean-square charge radius of the atomic nucleus. When going to lighter masses, a surprisingly large and early departure from sphericity is observed, which is only partly reproduced by beyond mean field calculations.
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Affiliation(s)
- T E Cocolios
- Instituut voor Kern- en Stralingsfysica, K.U. Leuven, B-3001 Leuven, Belgium
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