Thick-target yields of 'NB' ('BR') on 'ZR' ('SE') and their effect on geochemically measured 'BETA''BETA' half-lives - Rios, P B; Cybulska, E. W.; Cruz, M T F; Goldman, I D; Oliveira, José Roberto Brandão de; Pascholati, Paulo Reginaldo; Ribas, Roberto Vicençotto; Rizzutto, Márcia de Almeida (Reuniao de Trabalho em Fisica Nuclear No Brasil, 1995)