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首页> 外文期刊>Crystallography reports >Investigation of thermal processes in one- and two-layer materials under irradiation with high-energy heavy ions within the thermal peak model
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Investigation of thermal processes in one- and two-layer materials under irradiation with high-energy heavy ions within the thermal peak model

机译：热峰模型内高能重离子辐照下一层和两层材料的热过程研究

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摘要

A system of equations for the electron and lattice temperatures around and along the path of a 700-MeV heavy (uranium) ion in nickel (one-layer material) is solved numerically in the axially symmetric cylindrical coordinate system under the assumption of temperature-dependent specific heat and thermal conductivity. The obtained dependences of the lattice temperature on the radius (distance from the ion path) and depth suggest that the ionization energy loss of a 700-MeV uranium ion in nickel is sufficient to melt the material. A comparative analysis with the linear model is performed and the maximum radius and depth of the region where the target material can melt is estimated. Then, the initial system of equations is solved for the region around and alone, the path of a 710-MeV heavy (bismuth Bi-209) ion in the two-layer material Ni(2 mu m)-W with constant thermophysical parameters. The obtained dependences of the lattice temperature on the radius and depth show that the ionization energy loss of a 710-MeV bismuth ion in this two-layer material is sufficient for melting. The maximum radius and depth of the regions in the target material where phase transitions may occur are estimated.
机译：假设温度依赖于轴向对称圆柱坐标系，则在轴向对称圆柱坐标系中以数值方式求解镍（一层材料）中700-MeV重（铀）离子周围和沿其路径的电子和晶格温度方程组比热和导热率。所获得的晶格温度对半径（与离子路径的距离）和深度的依赖性表明，镍中700-MeV铀离子的电离能损失足以熔化材料。使用线性模型进行比较分析，并估计目标材料可以熔化的区域的最大半径和深度。然后，针对具有恒定热物理参数的两层材料Ni（2μm）-W中的710-MeV重（铋Bi-209）重离子的路径，求解了单独的周围区域的方程式的初始系统。所获得的晶格温度对半径和深度的依赖性表明，在这种两层材料中，710-MeV铋离子的电离能损失足以熔化。估计目标材料中可能发生相变的区域的最大半径和深度。

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