Abstract：A method for calculating the attenuation coefficient of X-rays in matter by radiography was proposed. The attenuation coefficient of X-rays with different energies in matter was quickly obtained through simple experiments and calculation. The design experiment found out the relation curve between the blackness of the negative and the thickness of the workpiece, deduced the expression, and obtained the confidence interval of the expression. The X-ray attenuation coefficients of steel stepped test block at 140kV, 130kV and 120kV tube voltages were measured by radiographic method. The standard errors were less than 3%, which proved the reliability of the method. The X-ray radiography method is simple in calculation, convenient in operation and small in error. It is expected to be widely applied to the estimation of X-ray attenuation coefficient in materials.
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2020, Vol. 41 
