[en] The present work search to design a method for the evaluation of natural and anthropic radionuclides in Chilean soils, for which the international literature was reviewed, a hybrid method is generated product of the literature analysis and equipment availability in Chile, and is executed an example based on the recommended method. (paper)

[en] We present a topographical study of the formation of thin films of gold on muscovite mica. The characterization of the samples was done with scanning tunneling microscopy, atomic force microscopy as well as electric measurements. We performed our study on two groups of samples: first group of samples, evaporated at room temperature for thickness ranging from 1.5 up to 97 nm; second group of samples, for two different thicknesses of 3 nm and 50 nm evaporated at different substrate temperatures, between 110 and 530 K. The gold films show a Volmer–Weber growth. The complete films are obtained from samples with a nominal thickness of 8 nm deposited. The average grain diameter is constant, with nominal thicknesses of 18.5 nm, up to 8 nm and increases with the thickness for higher deposition. The average grain diameter is similar regardless of the temperature of the substrate for samples of 3 nm thickness, but changes for samples of 50 nm thickness. The resistivity is inversely dependent on nominal thickness and the mean free path is lineally dependent on nominal thickness. - Highlights: • We have grown thin gold films onto mica at different substrate temperatures. • We identified a continuous film at nominal thickness of 8 nm. • The grain size shows a direct dependence on the nominal film thickness. • The electron mean free path, at 4 K, is linearly dependent on nominal thickness