Abstract: APPLICATINS OF THERMAL NEUTRON TRANSMISSION GAUGE IN CHINA Liu Shengkang（PPhysics Department of Nanjing University,210093）ABSTRACT The prmciplc，installation and applied status in Chinil for the thermal neutron transmission gaugcare described．The measurable parameters include in the moisture of the small sample,gadolinium contents, hydrogen contents, thickness，hydrogenous index and specific surface area.Key words themal neutron transmission gauge moisture gadolinium content hydrogen con-tent hydrogenous index thickness specific surface arca