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南京大学研制的热中子透射计除用于测定小样品水分外,在材料科学方面已被用来测量磁性材料的含Gd量,在石油勘探科研方面已被用来测量岩样的含氢指数。由于氢的热中子截面很大,该计可以测量材料内的含氢量。 γ-Fe_2O_3磁粉是一种录磁介质的材料。γ-Fe_2O_3是Fe)3O_4向α-Fe_2O_3相过渡的亚稳相。γ-
In addition to measuring small samples of water, the thermal neutron transmissometer developed by Nanjing University has been used to measure the Gd content of magnetic materials in materials science. It has been used in petroleum exploration and research to measure the hydrogen index . Due to the large thermal neutron cross section of hydrogen, the meter measures the amount of hydrogen in the material. γ-Fe_2O_3 magnetic powder is a magnetic recording medium material. γ-Fe 2 O 3 is a metastable phase of transition from Fe 3 O 4 to α-Fe 2 O 3 phase. γ-