%A"Ramos, C W" %A"Gante, V" %A"Ribeiro, L M" %D1992 %I; Instituto de Engenharia Nuclear (IEN), Rio de Janeiro, RJ (Brazil) %2 %J[] %K46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY, 42 ENGINEERING, INDUSTRIAL RADIOGRAPHY, SCREENS, COMPARATIVE EVALUATIONS, EFFICIENCY, ELECTROMAGNETIC RADIATION, GAMMA RADIATION, SENSITIVITY ANALYSIS, X RADIATION, 440101, 420500, GENERAL DETECTORS OR MONITORS AND RADIOMETRIC INSTRUMENTS, MATERIALS TESTING %PMedium: X; Size: [26] p. %TA comparative study about the efficiency of several industrial radiographic intensifying screens types by evaluation factor and the equivalent penetrometer sensitivity; Estudo comparativo do rendimento de diversos tipos de telas intensificadoras utilizadas em radiografia industrial pelo metodo de avaliacao do fator de intensificacao e da sensibilidade percentual equivalente do indicador de qualidade de imagem - IEN %XWhen a x-ray or gamma-ray beam strikes a film usually less than 1% of the energy is absorbed resulting in a photographic effect. Obviously, any mean of utilizing more fully the unabsorbed percentage of energy without complicating too much the technical radiographic procedure is highly desirable. One very common procedure is to use the film between two intensifying screens. These screens have the property of emitting electrons (lead screens) or become fluorescent (fluorescent screens) when stricken by electromagnetic radiation thus resulting in a supplementary photographic action on the film emulsion. This work presents an efficiency comparison of the more usual varieties of these intensifying screens for energies of x-ray until 300 K V. (author). %0Technical Report %NIEN-37/92;Other: ON: DE93609515; TRN: BR9230409002638 %1 %CBrazil %Rhttps://doi.org/ Other: ON: DE93609515; TRN: BR9230409002638 INIS %GPortuguese