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为了解氚在铜表面的吸附和解吸行为,对铜样品在n(D)∶n(T)=1∶1,503 K时,15 MPa下恒温8 h后,再在27 MPa恒温6 h下进行了氚的吸附,并对吸附氚的铜样品在室温下和加热到1 173 K时的解吸氚量和吸附总氚量进行了测量。结果表明,铜的吸附总氚量为31.89 MBq/cm2,解吸氚量为29.18 MBq/cm2,测量的标准差为6.49%;室温和加热条件下铜所释放的氚中,化学成分主要是HTO和HT,大部分以HT形式存在;铜的自由氚量占吸附总氚量的3.64%;铜的热解吸谱至少存在3个解吸峰,其解吸温度分别为650,750和1 173 K以上。
In order to understand the adsorption and desorption behaviors of tritium on copper surface, copper samples were heated at 15 MPa for 8 h at n (D): n (T) = 1: 1, 503 K and then at 27 MPa for 6 h Tritium adsorption, and tritium adsorption of tritiated copper samples at room temperature and heated to 1 173 K desorption of tritium and total tritium adsorption was measured. The results show that the total amount of tritium adsorbed by copper is 31.89 MBq / cm2, the amount of desorbed tritium is 29.18 MBq / cm2, and the standard deviation of measurement is 6.49%. The chemical composition of copper released by copper is HTO and HT, most of which are in the form of HT. The free tritium content of copper accounts for 3.64% of the total tritium content of adsorption. There are at least three desorption peaks in the pyrolysis spectrum of copper with desorption temperatures of 650, 750 and 1 173 K, respectively.