高压氘氚气氛下铜对氚的吸附

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。

Sorption of Tritium on Copper in High Pressure Mixed Gas of Deuterium and Tritium

The sorption and desorption behavior of tritium on the surface of copper were stu-died.After the exposure in the mixed gas of 50% deuterium and 50% tritium(15 MPa mixed gas,8 h and 27 MPa mixed gas,6 h exposure at 503 K),the tritium desorbed at room temperature and during heating up to 1 173 K and total sorbed tritium of the samples were measured.The results show that the total sorbed tritium is 31.89 MBq/cm2,the desorbed tritium is 29.18 MBq/cm2.The standard deviation of measurement is 6.49%.The tritium released from copper at room temperature and during heating is mostly in the form of HT.The ratio of the free tritium to the sorbed tritium is 3.64%.There are three peaks in the thermal-desorption spectra from copper,their desorption temperatures of the three peaks are 650,750,and 1 200 K,respectively.