Speaker
Rubens Lichtenthäler
(University of São Paulo)
Description
RIBRAS [1] is presently the only experimental equipment in South America capable of producing secondary beams of rare isotopes. It consists of two superconducting solenoids, presently installed in one of the beam lines of the 8 MV Pelletron Tandem accelerator of the University of São Paulo. The exotic nuclei are produced by the collision between the primary beam of the Pelletron Accelerator and the primary target, placed just before the first solenoid. The secondary beam is produced by the in-flight technique and is usually contaminated by particles coming from scattering and reactions in the primary target such as 7Li, alpha and other light particles such as protons, deuterons and tritons. The main contamination of the comes from 7Li2+ particles coming from the primary beam.
A degrador placed between the two solenoids is able to separate those particles from the 6He beam providing an additional charge exchange 7Li2+-->3+. In addition, the differential energy loss in the degrador provides further selection of the light particles as protons, deuterons, tritons and and alpha particles by the second solenoid.
Here we present the results of the first experiment performed a t RIBRAS using both solenoids. A pure 6He beam was produced and the reaction 6He+p was measured using a thick CH2 target.
1. R. Lichtenthäler et al., Eur. Phys. J. A 25,s01,733 (2005)
Primary author
Rubens Lichtenthäler
(University of São Paulo)
Co-authors
Dr
Pedro Neto Faria
(USP)
Mr
Rubén Condori
(USP)
