We describe the production of francium beams from the fusion-evaporation reaction Au197(O18,kn)215-kFr generated by a ∼100 MeV O6+18 beam on a thick gold target. The physics of the production process is discussed, together with estimates of expected production rates. The production target is heated to ∼1200K and kept at a potential of +3kV to enhance Fr diffusion and surface desorption, and to accelerate surface-ionized ions. Details are given on its design and construction. The performance of the target is measured as a function of primary beam energy and flux, target temperature and extraction voltage. Average production rates are 0.7×106ions/s for 210Fr with a primary beam flux of 1012particles/s, with peaks of 2×106ions/s. From these measurements, information on the efficiency of the release processes is inferred. © 2005 Elsevier B.V. All rights reserved.

Stancari, G., Veronesi, S., Corradi, L., Atutov, S.N., Calabrese, R., Dainelli, A., et al. (2006). Production of radioactive beams of francium. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 557(2), 390-396 [10.1016/j.nima.2005.11.193].

Production of radioactive beams of francium

MARIOTTI, E.;MOI, L.;
2006-01-01

Abstract

We describe the production of francium beams from the fusion-evaporation reaction Au197(O18,kn)215-kFr generated by a ∼100 MeV O6+18 beam on a thick gold target. The physics of the production process is discussed, together with estimates of expected production rates. The production target is heated to ∼1200K and kept at a potential of +3kV to enhance Fr diffusion and surface desorption, and to accelerate surface-ionized ions. Details are given on its design and construction. The performance of the target is measured as a function of primary beam energy and flux, target temperature and extraction voltage. Average production rates are 0.7×106ions/s for 210Fr with a primary beam flux of 1012particles/s, with peaks of 2×106ions/s. From these measurements, information on the efficiency of the release processes is inferred. © 2005 Elsevier B.V. All rights reserved.
2006
Stancari, G., Veronesi, S., Corradi, L., Atutov, S.N., Calabrese, R., Dainelli, A., et al. (2006). Production of radioactive beams of francium. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 557(2), 390-396 [10.1016/j.nima.2005.11.193].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/3576
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