External PIGE-PIXE measurements at the São Paulo 8UD tandem accelerator - Rizzutto, Márcia de Almeida; Tabacniks, Manfredo Harri; Added, Nemitala; Liguori Neto, Raphael; Acquadro Quacchia, Juan Carlos; Vilela, M M; Oliveira, T R C F; Markarian, R A; Mori, Matsuyoshi (Nuclear Instruments and Methods and Physics Research B, 2002)