Film Density Distribution of Radiation Field and Affection Factors in Radiographic Testing

Film density and its distribution in X ray radiation field are important factors which affect inspection sensitivity of in dustry radiographic testing.Based on radiation intensity distribution and film sensitization principle,an approximate function of film density distribution in radiation field is derived.A series of variation curves of relative film density against radiation angle are made under different penetration parameters.Affection of penetration parameters on distribution uniformity of film density is analyzed.The theoretical results are verified by the experiment measurement.