用等离子体阴极电子束在multi-keV范围内的$^{181}$ Ta（e，e '）$^{181}$ Ta $^*$的预期产率
Expected yields of $^{181}$Ta (e,e') $^{181}$Ta$^*$ in the multi-keV range with a plasma-cathode electron beam
摘要：
在多keV能量范围内，电子与原子核的非弹性散射$(e,e')$截面的计算强烈依赖于对原子核库仑势屏蔽的描述以及原子核附近入射和出射电子的波函数的变形.这些横截面在低于$10^{-30}$ cm $^2$的值下进行评估，其根据模型变化几个数量级。需要实验测量来约束模型，但测量如此低的截面是一个真正的挑战。在这项研究中，我们证明了非弹性电子散射是主要的核激发机制在$^{181}$钽靶照射与一个新的强流10 - 30 keV的电子束产生的偏置激光等离子体。计算表明，通过对转换电子的探测，应该可以测量核激发产额。电子束加热和等离子体沉积对钽靶的影响被量化，从而允许一个可能的实验配置的尺寸，以研究$(e,e')$过程中，在这个范围内的能量的第一次。
英文摘要：
Calculations of the cross sections of inelastic electron scattering $(e,e')$ on a nucleus in the multi-keV energy range strongly depend on the description of the screening of the nuclear Coulomb potential as well as on the deformation of the wave functions of the incoming and outgoing electron in the vicinity of the nucleus. These cross sections are evaluated at values lower than $10^{-30}$ cm$^2$ which vary by several orders of magnitude according to the models. Experimental measurements would be required to constrain the models but it is a real challenge to measure such low cross sections. In this study, we demonstrate that inelastic electron scattering is the main nuclear excitation mechanism in a $^{181}$Ta target irradiated with a new intense 10 - 30 keV electron beam produced with a biased laser-plasma. Calculations show that through the detection of conversion electrons, it should be possible to measure the nuclear excitation yields. The effect of electron beam heating and of plasma deposition on the tantalum target are quantified, thus allowing the dimensioning of a possible experimental configuration to study $(e,e')$ processes in this range of energy for the first time.
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