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Isomer separation of Cu and Cu with a resonance ionization laser ion source |
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| Authors: | U Kster V N Fedoseyev V I Mishin L Weissman M Huyse K Kruglov W F Mueller P Van Duppen J Van Roosbroeck P Thirolf H G Thomas D Weisshaar W Schulze R Borcea M La Commara H Schatz K Schmidt S Rttger G Huber V Sebastian K L Kratz R Catherall U Georg J Lettry M Oinonen H L Ravn H Simon ISOLDE collaboration |
| Affiliation: | a Physik-Department, Technische Universität München, 85748 Garching, Bavaria, Germany b ISOLDE, CERN, 1211, Genève 23, Switzerland c Institute of Spectroscopy, Russian Academy of Sciences, 142092, Troitsk, Russia d Instituut voor Kern- en Stralingsfysica, K.U. Leuven, 3001, Leuven, Belgium e Sektion für Physik, Ludwig-Maximilians-Universität München, 85748 Garching, Bavaria, Germany f Institut für Kernphysik,Universität zu Köln, 50937, Köln, Germany g Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, 01314, Dresden, Germany h Gesellschaft für Schwerionenforschung, 64220, Darmstadt, Germany i CEA Saclay, DSM/DAPNIA/SPhN, 91191, Gif-sur-Yvette, France j Institut für Physik, Universität Mainz, 55099, Mainz, Germany k Institut für Kernchemie, Universität Mainz, 55099, Mainz, Germany |
| Abstract: | Radioactive copper isotopes were ionized with the resonance ionization laser ion source (RILIS) at the on-line isotope separator ISOLDE (CERN). Using the different hyperfine structure in the 3d10 4s 2S1/2 – 3d10 4p 2P01/2 transition the low- and high-spin isomers of 70Cu were selectively enhanced by tuning the laser wavelength. The light was provided by a narrow-bandwidth dye laser pumped by copper vapor lasers (CVL) and frequency doubled in a BBO crystal. The ground state to isomeric state intensity ratio could be varied by a factor of 30, allowing to assign gamma transitions unambiguously to the decay of the individual isomers. It is shown that the method can also be used to determine magnetic moments. In a first experiment for the 1+ ground state of 70Cu a magnetic moment of (+)1.8(3) μN and for the high-spin isomer of 70Cu a magnetic moment of (±)1.2(3) μN could be deduced. |
| Keywords: | Isomer separation 70Cu Resonance ionization Laser ion source Resonance ionization spectroscopy Magnetic moment Hyperfine structure |
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