Abstract: STATIC MEASUREMENT OF THICKNESS OF STEEL PLATE USING SLOW NEUTRON BEAMZhang Zhiping Liu Shengkang(Physics Department, Nanjing University, 210093)ABSTRACTThe static method is used to measure the thickness of steel plate by means of slow neutron beam. It is found that the higher the detector is located, the worse the detecting sensitivity, and the detector height should be less than 15 cm. When the width of the steel plate is over 10 cm, the change of its width does not have any effect on the result of the measurement. BY3 steel plate and DT4 pure iron plate are experimentally calibrated, these two kinds materials have the same calibration coefficients. Linear calibration curves are given for 4 detector heights at thickness of 6-20 mm. Key words slow neutron beam measurment\ steel plate thickness\ static study