Münster 2002 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 49: Plenary Session

HK 49.4: Plenary Talk

Friday, March 15, 2002, 10:00–10:30, Plenarsaal

Acceleration of radioactive ion beams at REX-ISOLDE — •O. Kester — Sektion Physik der LMU München, Am Coulombwall 1, D-85748 Garching

In 2001 the linear accelerator of the Radioactive beam Experiment (REX-ISOLDE) delivered for the first time accelerated radioactive ion beams with a beam energy of 2 MeV/u. REX-ISOLDE uses the method of charge state breeding, in order to enhance the charge state of the ions before injection into the LINAC. Radioactive singly charged ions delivered by the on-line mass separator ISOLDE are first accumulated in a Penning trap, then charge bred to an A/q = 4.5 in an electron beam ion source (EBIS) and finally accelerated in a LINAC from 5 keV/u to the final energy between 0.8 and 2.2 MeV/u. Measurements of the interplay between the REXTRAP, the transfer line and the EBIS have been done as well as the first commissioning of the accelerator. Therewith the properties of the different elements could be determined and a first optimization of the system could be carried out. In two test beam times in 2001 stable and radioactive Na isotopes (²³Na-²⁶Na) have been accelerated and transmitted to a preliminary target station. There ⁵⁸Ni and Be targets have been used to populate exited states via Coulomb excitation and nuclear transfer reactions. First results of the commissioning and of the beam times will be presented. supported by the BMBF under 06LM974 and 06HD802I