Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.80: Poster
Donnerstag, 19. März 2009, 14:00–16:00, Audi-Max
Actinides AMS measurements at CIRCE in Caserta (Italy) — •Mario De Cesare1,3, Nicola De Cesare2,3, Antonio D'Onofrio1,3, Lucio Gialanella3, Yonjing Guan1,4, Antonio Petraglia1, Francesca Quinto5, Vincenzo Roca3,6, Detlef Rogalla1,3, Carlo Sabbarese1, and Filippo Terrasi1,3 — 1CIRCE, INNOVA, and DSA (SUN), Caserta, Italy — 2CIRCE, INNOVA, and DSV (SUN) , Caserta, Italy — 3INFN Sezione di Napoli, Napoli, Italy — 4ICTP, Trieste, Italy — 5Institut für Isotopenforschung und Kernphysik, Universität Wien, Vienna, Austria — 6DSF, Università Federico II , Napoli, Italy
Nuclear Weapons (NW) use the destructive effects of supercritical chain reactions while Nuclear Power Plants (NPP) convert nuclear energy in electric power by thermal one. These operations lead to the release in the environment a wide range of radioactive nuclides that are present in environmental samples at ultra trace levels. Their detection requires the resolution of mass spectrometric techniques, but only AMS allows the sensitivity needed. In order to perform the isotopic ratio measurements of actinides, e.g. 236U/238U and xPu/239Pu, an upgrade of the CIRCE accelerator in Caserta, Italy, has been planned. The main difficulty of the AMS measurement of 236U and of xPu isotopes is the intense neighbouring beam of 238U. We report the results of simulations aimed to define the best ion optics and to understand the origin of background ions and test measurements are shown. A high resolution TOF-E detector system is described, designed to identify the rare isotopes and the unsuppressed interfering ions.