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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Instrumentation
HK 49.4: Vortrag
Dienstag, 5. März 2013, 17:30–17:45, WIL-C207
Production of short lived radioactive molecular ion beams at ISOLDE/CERN — •Christoph Seiffert1,2, Thierry Stora1, Thorsten Kroell2, Alexander Gottberg1, and Matthias Kronberger1 — 1CERN — 2TU Darmstadt
The ISOLDE facility at CERN offers a wide range of radioactive isotopes all over the nuclear chart with half lives down to milliseconds for various types of experiments in nuclear structure. Nevertheless some isotopes are not yet extractable in a decent amount. The reasons for this are diverse. For the case of Carbon and Boron isotopes one reason is, that the boiling point of these elements is above the maximum achievable operation temperature of the target units. Forming with these elements more volatile molecules, e.g. oxides or fluorides, enables their *extraction* at accessible temperatures. Even when the molecules are produced, the extraction is not necessarily possible. For instance chemical reactivity might cause an irreversible interaction and losses of the molecules with the target container material. When a chemically inert material is used high adsorption enthalpies of the molecules on the surface can induce sticking times for a multiple of the half live of the isotope and thus leads to decay losses. The presentation shows the progress of the investigations and on-line results.