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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.80: Poster

Thursday, March 19, 2009, 14:00–16:00, Audi-Max

Actinides AMS measurements at CIRCE in Caserta (Italy) — •Mario De Cesare^1,3, Nicola De Cesare^2,3, Antonio D'Onofrio^1,3, Lucio Gialanella³, Yonjing Guan^1,4, Antonio Petraglia¹, Francesca Quinto⁵, Vincenzo Roca^3,6, Detlef Rogalla^1,3, Carlo Sabbarese¹, and Filippo Terrasi^1,3 — 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.