Physically realized electron gas systems usually reside in either the quantum non-degenerate or fully degenerate limit, where the average de Broglie wavelength of the thermal electrons becomes comparable with the interparticle distance between electrons. A few systems, such as young brown dwarfs and the cold dense fuels created in imploded cryogenic capsules at the National Ignition Facility, lie between these two limits and are partially degenerate. The National Ignition Facility has the unique capability of varying the electron quantum degeneracy by adjusting the laser drive used to implode the capsules. This allows experimental studies of the effects of the degeneracy level on plasma transport properties. By measuring rare nuclear reactions in these cold dense fuels, we show that the electron stopping power, which is the rate of energy loss per unit distance travelled by a charged particle, changes with increasing electron density. We observe a quantum-induced shift in the peak of the stopping power using diagnostics that measure above and below this peak. The observed changes in the stopping power are shown to be unique to the transition region between non-degenerate and degenerate plasmas. Our results support the screening models applied to partially degenerate astrophysical systems such as young brown dwarfs.

物理实现的电子气系统通常位于量子非简并或完全简并极限，其中热电子的平均德布罗意波长变得与电子之间的粒子间距离相当。一些系统，例如年轻的褐矮星和在国家点火装置内爆的低温舱中产生的冷致密燃料，位于这两个极限之间并且部分退化。国家点火装置具有通过调整用于内爆胶囊的激光驱动器来改变电子量子简并性的独特能力。这允许对简并水平对等离子体传输特性的影响进行实验研究。通过测量这些冷稠密燃料中罕见的核反应，我们证明了电子阻止能力，这是带电粒子每行进单位距离的能量损失率，随着电子密度的增加而变化。我们使用在该峰值上方和下方测量的诊断方法观察到阻止本领峰值的量子诱导变化。观察到的阻止本领的变化被证明是非简并等离子体和简并等离子体之间的过渡区域所独有的。我们的结果支持应用于部分退化天体物理系统（如年轻的褐矮星）的筛选模型。观察到的阻止本领的变化被证明是非简并等离子体和简并等离子体之间的过渡区域所独有的。我们的结果支持应用于部分退化天体物理系统（如年轻的褐矮星）的筛选模型。观察到的阻止本领的变化被证明是非简并等离子体和简并等离子体之间的过渡区域所独有的。我们的结果支持应用于部分退化天体物理系统（如年轻的褐矮星）的筛选模型。