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The Universal Linear Accelerator is a heavy ion linac based at the Heavy Ion Research Centre (GSI) near Darmstadt, Germany. It can provide beams of accelerated ions of elements from Lithium to Uranium with energies up to 11.4 MeV / u. It consists of two ions sources terminals followed by a Radio Frequency Quadrupole (RFQ) and and by an Intergidigital linac IH linac accelerator resonating at 36 MHz up to the energy of 1.4 MeV/u. The main part then is operated by a classical linac of the Alvarez type which resonates at 108 MHz. The UNILAC is used both to send beams of heavy ions to experiments and to load the SIS Heavy-Ion Synchrotron (Schwer-Ionen-Synchrotron) with high-energy ions.

Collisions between heavy-ion beams and stationary targets can be made to generate superheavy transactinide elements. Experiments using beams from UNILAC have produced, in the past 20 years, elements 107 to 112.

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