论文标题
Ni，Cu和MgO单晶中中子和离子辐照引起的晶格参数变化的比较
Comparison of neutron and ion irradiation induced lattice parameter changes in Ni, Cu and MgO single crystals
论文作者
论文摘要
在中子反应堆中辐照的Ni，Cu和MGO单晶的晶格参数变化文献中可用的数据是使用临时辐照实验进行重现的。选择了离子的性质和能量，以使其加权平均后坐力光谱充其量匹配反应器内部中子通量的平均后坐力光谱。计算离子通量以获得每个原子（DPA）水平相似的平均位移。使用X射线衍射测定辐照样品的晶格参数。我们表明，对于金属而言，不可能再现中子数据，从本质上是因为DPA水平较低，并且受辐射的，受损的体积很小。相反，对于MGO，获得了非常紧密的晶格参数变化，前提是相对于反应器（300 K）的辐射温度显着升高（1000 K）。
Data available in the literature of lattice parameter changes in Ni, Cu and MgO single crystals irradiated in neutron reactors are tentatively reproduced using ad hoc ion irradiation experiments. The nature and energy of the ions were selected so that their weighted average recoil spectrum matches at best that of the neutron flux inside the reactor. The ion fluence was calculated to obtain similar, average displacements per atom (dpa) levels. The lattice parameters of the irradiated samples were determined using X-ray diffraction. We show that, for the metals, it is not possible to reproduce the neutron data, essentially because the dpa levels are low and the irradiated, damaged volume is small. On the contrary, for MgO, a very close lattice parameter change is obtained, providing that the irradiation temperature is significantly increased (1000 K) with respect to that in the reactor (300 K).
