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Laser Ionization and Penning Trap Mass Spectrometry – A Fruitful Combination for Isomer Separation and High-precision Mass Measurements |
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| Authors: | K. Blaum D. Beck G. Bollen P. Delahaye C. Guénaut F. Herfurth A. Kellerbauer H.-J. Kluge U. Köster D. Lunney S. Schwarz L. Schweikhard C. Yazidjian |
| Affiliation: | 1. Institute of Physics, Johannes Gutenberg-University, 55099, Mainz, Germany 2. GSI Darmstadt, Planckstra?e 1, 64291, Darmstadt, Germany 3. NSCL, Michigan State University, East Lansing, MI, 48824-1321, USA 4. Department of Physics, CERN, 1211, Geneva 23, Switzerland 5. CSNSM-IN2P3-CNRS, 91405, Orsay-Campus, France 6. Institute of Physics, Ernst-Moritz-Arndt University, 17487, Greifswald, Germany |
| Abstract: | We have demonstrated for the first time that element-selective laser ionization in combination with ultra-high resolution mass spectrometry can be used to prepare isomerically pure ion ensembles. Together with β–γ coincidence studies this method allowed a determination of the low-energy structure and the unambiguous identification of triple β-decaying isomerism in 70Cu. By selective resonant ionization and measurement of the masses of these three states using ISOLTRAP at ISOLDE/CERN with a relative uncertainty of δm/m ≈ 5 ⋅ 10−8 a clear state-to-mass assignment was possible which resolved the assignment puzzle in 70Cu. |
| Keywords: | laser ionization mass spectrometry nuclear isomers nuclear masses penning trap |
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