Production of neutron-rich surface-ionized nuclides at PARRNe

• Published in: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2003-05, Vol.204, p.257-260
• Main Authors: Lau, C., Hosni, F., Perru, O., Bajeat, O., Borcea, R., Bourgeois, Ch, Donzaud, C., Ducourtieux, M., Essabaa, S., Guillemaud-Mueller, D., Ibrahim, F., Lefort, H., Obert, J., Potier, J.C., Fioretto, E., Lhersonneau, G., Prete, G., Stroe, L., Tecchio, L., Pfeiffer, B., Joinet, A., Köster, U., Lettry, J., Peräjärvi, K.
• Format: Article
• Language: English
• Subjects: Cs isotopes; ISOL; Neutron-rich Rb; Nuclear Experiment; Physics
• ISSN: 0168-583X; 1872-9584; 1872-9584; 0168-583X
• DOI: 10.1016/S0168-583X(02)01920-1

Yields of neutron-rich isotopes produced by fast neutron induced fission of 238U were measured at the ISOL set-up Production d’Atomes Radioactifs Riches en Neutrons. A surface ion source was used to ionize selectively elements with low ionization potentials. In order to observe also the most n-rich isotopes, the identification was achieved by a combined measurement of β- and γ-rays and β-delayed neutrons. The flux of fast neutrons inducing fission was generated by a 1 μA beam of 26 MeV deuterons stopped in a graphite converter. The target was a standard ISOLDE type 238UC X /graphite (50 g/cm 2) heated by a tantalum oven to about 2050 °C. A large variety of radioactive isotopes could be determined quantitatively. Production rates measured for Rb and Cs isotopes are presented here.