version française rss feed
HAL : in2p3-00159387, version 1

Fiche détaillée  Récupérer au format
XVth International Conference on Electromagnetic Isotope Separators and Techniques related to their Applications (EMIS2007), Deauville : France (2007)
Studies of uranium carbide targets of a high density
V.N. Panteleev, O. Alyakrinskiy1, M. Barbui1, A.E. Barzakh, M. Dubois2, C. Eléon2, S. Essabaa3, D.V. Fedorov, G. Gaubert2, A.M. Ionan, V.S. Ivanov, P. Jardin2, C. Lau3, R. Leroy2, G. Lhersonneau2, K.A. Mezilev, C. Mhamed3, P.L. Molkanov, F.V. Moroz, S.Yu. Orlov, M.G. Saint Laurent2, L. Stroe1, L.B. Tecchio1, M. Tonezzer1, A.C.C. Villari2, Yu.M. Volkov

Production of Rb, Cs and Fr isotopes from uranium carbide targets of a high density has been investigated. The UC target material with a density of 12 g/cm3 was prepared in a form of pellets of 2 mm thickness, 11 mm in diameter and grain dimensions of about 20 microns. Two targets were tested on-line at the same temperature conditions: a) a reference small target with a thickness of 4.5 g/cm2; b) a big massive target with a thickness of 91 g/cm2. The yields and release efficiencies of the nuclides with the half-lives from some minutes to some milliseconds produced from the investigated targets have been presented. A preliminary analysis of the obtained results has shown an increase of the produced nuclide yields proportionally to the target thickness even for very short-lived isotopes 214Fr (T1/2=5 ms) and 219Fr (T1/2=20 ms). One month off-line heating test of a big target at a temperature of 2000 °C has been conducted. The yields and release of Rb, Cs and Fr measured on-line before and after the heating test coincided in the limits of measurement errors that demonstrated the conservation of the developed target unit parameters. The construction of a big target with the mass about 0.7 kg prepared presently at IRIS has been discussed.
1 :  LNL - Laboratori Nazionali di Legnaro
2 :  GANIL - Grand Accélérateur National d'Ions Lourds
3 :  IPNO - Institut de Physique Nucléaire d'Orsay
Physique/Physique Nucléaire Expérimentale
Uranium carbide target – Ionising target – Massive target – Yield – Delay time