一、前言γ-射线测沙技术的发展已有二十多年的历史,在众多类型的测沙仪中,大多采用测量计数率的变化,通过查率定曲线得到含沙量(也有用率表线性显示,但其精度不高)。近年在开辟和维护航道,疏浚泥浆扩散、浮泥及淤泥容重的观测中,除要求快 I. INTRODUCTION The development of γ-ray sand detection technology has been in the history of more than 20 years. Most of the many types of sand-measuring instruments adopt the change of measurement count rate, and the sediment concentration is obtained by checking the calibration curve Table linear display, but its accuracy is not high). In recent years in the exploration and maintenance of waterways, dredging mud diffusion, mud and sludge bulk density of the observation, in addition to fast