Physics – Accelerator Physics
Scientific paper
2000-09-11
eConf C000821 (2000) TU203
Physics
Accelerator Physics
5 pages 0 figures presented at LINAC-2000 Monterey paper TU203
Scientific paper
Exotic beams of short-lived radioisotopes are produced in nuclear reactions such as thermal neutron induced fission, target or projectile fragmentation and fusion reactions. For a given radioactive ion beam (RIB), different production modes are in competition. For each of them the cross section, the intensity of the projectile beam and the target thickness define an upper production rate. The final yield relies on the optimisation of the ion-source, which should be fast and highly efficient in view of the limited production cross section, and on obtaining a minimum diffusion time out of the target matrix or fragment catcher to reduce decay losses. Eventually, either chemical or isobaric selectivity is needed to confine unwanted elements near to the production site. These considerations are discussed for pulsed or dc-driven RIB facilities and the solutions to some of the technical challenges will be illustrated by examples of currently produced near-drip-line elements.
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