标题： 能量电子在超流氦-4中的闪烁和电荷提取 显示英文标题

标题： Scintillation and charge extraction from the tracks of energetic electrons in superfluid helium-4

摘要： 一个能量电子穿过液态氦会在其轨迹上引起电离。 电离的电子会迅速与产生的正离子复合，从而产生瞬时闪烁光。 通过施加适当的电场，部分电离的电子可以与其母离子分离。 在给定电场下被提取的电离电子的比例取决于电子与离子之间的分离距离。 我们通过研究在施加电场下闪烁光的淬灭现象，确定了在1.5 K的超流氦中，β粒子轨迹上产生的电荷对的平均电子-离子分离距离。 了解这一平均分离参数将有助于设计使用超流氦作为靶材料的粒子探测器。 显示英文摘要

摘要： An energetic electron passing through liquid helium causes ionization along its track. The ionized electrons quickly recombine with the resulting positive ions, which leads to the production of prompt scintillation light. By applying appropriate electric fields, some of the ionized electrons can be separated from their parent ions. The fraction of the ionized electrons extracted in a given applied field depends on the separation distance between the electrons and the ions. We report the determination of the mean electron-ion separation distance for charge pairs produced along the tracks of beta particles in superfluid helium at 1.5 K by studying the quenching of the scintillation light under applied electric fields. Knowledge of this mean separation parameter will aid in the design of particle detectors that use superfluid helium as a target material.