[1] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[2] Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[3] Univ Nacl Cuyo, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Campinas, SP, Brazil
[5] Univ Fed Parana, Dept Fis, BR-80060000 Curitiba, Parana, Brazil
[6] Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina