Eur. Phys. J. Special Topics 150, 275-276 (2007)
DOI: 10.1140/epjst/e2007-00322-5

Release time calculations for the SPES direct UCx target

M. Barbui¹, A. Andrighetto¹, C. Antonucci², S. Carturan¹, F. Cervellera¹, S. Cevolani², M. Cinausero¹, P. Colombo³, A. Dainelli¹, P. Di Bernardo⁴, F. Gramegna¹, G. Maggioni¹, G. Meneghetti³, C. Petrovich², L. Piga¹, G. Prete¹, V. Rizzi¹, M. Santana-Leitner⁵, M. Tonezzer¹, P. Zanonato¹ and D. Zafiropoulos<sup>1

1</sup>  INFN Laboratori Nazionali di Legnaro, viale dell'Universitá 2, 35020 Legnaro (Pd), Italy
²  ENEA, via M.M. Sole 4, 40129 Bologna, Italy
³  Dipartimento di Ingegneria Meccanica, via Venezia 1, 35131 Padova, Italy
⁴  Dipartimento di Scienze Chimiche, via Marzolo 1, 35131 Padova, Italy
⁵  CERN, 1211 Geneva, Switzerland

barbui@lnl.infn.it

(Received: January 31, 2007 / Published online: 8 December 2007)

Abstract
A Direct Target for a mid-term RIB ISOL-type facility is being developed at LNL, in the framework of the R&D for the SPES project [1]. Using a 40 MeV proton beam impinging on a UCx thick target of 2.5 g/cm³ density, a production rate of 10¹³ in target fissions per second is expected [2]. The crucial point, when short-lived isotopes are produced in the target, is to build systems (target + ion source) with good release properties and high efficiency. Monte Carlo simulations were performed using the GEANT4 toolkit [3] and the RIBO code [4] in order to optimize our target geometry and to estimate the average release time.

PACS
29.25.Rm - Sources of radioactive nuclei.
24.10.Lx - Monte Carlo simulations (including hadron and parton cascades and string breaking models).
25.85.Ge - Charged-particle-induced fission.

© EDP Sciences, Springer-Verlag 2007