Abstract

The nuclear stopping power of hydrogen and helium isotopes in Be, C, and W materials that are promising for use as the first wall of a tokamak reactor are calculated. It is shown that the presence of an attracting potential well has a substantial effect on the dependence of the nuclear stopping power on the collision energy. The use of potentials calculated in the approximation of the density functional theory with an attracting potential well has allowed us to obtain more accurate values of the nuclear stopping power for hydrogen isotopes, which differ by 27–60% from the tabular data at low energies. The results for different hydrogen isotopes are well described by a universal curve.

中文翻译：

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铍，碳和钨中氢和氦同位素的核阻止能力

摘要

计算了有望用作托卡马克反应堆第一壁的Be，C和W材料中氢和氦同位素的核阻止能力。结果表明，引力势阱的存在对核止动力对碰撞能量的依赖性有很大的影响。使用通过密度泛函理论近似计算得出的具有吸引势阱的势能，我们可以获得氢同位素的更准确的核停止能值，该值与低能表中的数据相差27-60％。通用曲线很好地描述了不同氢同位素的结果。