The interplay between the statistical correlations of 'gama'-ray emission probabilities and efficiency calibration - Castro, Ruy M; Vanin, Vito Roberto; Helene, Otaviano Augusto Marcondes; Pascholati, Paulo Reginaldo; Maidana, Nora Lia; Dias, Mauro S; Koskinas, Marina F (Applied Radiations and Isotopes, 2004)