Laser spectroscopy of trapped Be-7 and Be-10 at a prototype slow RI-beam facility of RIKEN Academic Article uri icon


  • A next-generation slow radioactive nuclear ion beam facility (SLOWRI) which provides slow, high-purity and small emittance ion beams of all elements is being build as one of the principal facilities at the RIKEN RI-beam factory (RIBF). High energy radioactive ion beams from the projectile fragment separator BigRIPS are thermalized in a large gas catcher cell. The thermalized ions in the gas cell are guided and extracted to a vacuum environment by a combination of dc electric fields and inhomogeneous rf fields (rf carpet ion guide). From there the slow ion beam is delivered via a mass separator and a switchyard to various devices: such as an ion trap, a collinear fast beam apparatus, and a multi-reflection time of flight mass spectrometer. In the R&D works at the present RIKEN facility, an overall efficiency of 5% for a 100A MeV 8 Li ion beam from the present projectile fragment separator RIPS was achieved and the dependence of the efficiency on the ion beam intensity was investigated. Recently our first spectroscopy experiment at the prototype SLOWI was performed on Be isotopes. Energetic ions of 10 Be and 7 Be from the RIPS were trapped and laser cooled in a linear rf trap and the specific mass shifts of these isotopes were measured for the first time. 2007 Springer Science+Business Media B.V.

published proceedings


author list (cited authors)

  • Wada, M., Ishida, Y., Nakamura, T., Kanai, Y., Kojima, T. M., Takamine, A., ... Schuessler, H. A.

citation count

  • 2

complete list of authors

  • Wada, M||Ishida, Y||Nakamura, T||Kanai, Y||Kojima, TM||Takamine, A||Yamazaki, Y||Okada, K||Yoshida, A||Kubo, T||Katayama, I||Ohtani, S||Varentsov, V||Wollnik, H||Lioubimov, V||Schuessler, HA

publication date

  • November 2006