论文标题
电场对快速电子产生的液体氦闪烁的影响
Effect of an electric field on liquid helium scintillation produced by fast electrons
论文作者
论文摘要
据报道，快速电子产生的闪烁光和$α$颗粒的依赖性在0.44 K至3.12 K的温度范围内停止了液体氦气。对于两种类型的颗粒，由于所施加的磁场而引起的闪烁信号的强度的降低表现出明显的温度依赖性。使用Debye-Smoluchowski方程的近似解决方案，我们表明电子的明显温度依赖性可以用Geminate对重组相对于检测器信号积分时间重组所需的时间来解释。这一发现表明，次级电子相对于其Geminate伴侣的空间分布在较大的分离下具有沉重的非高斯尾巴，并且依赖于初级电离电子的能量。我们讨论了该结果对脉冲形状分析的潜在应用，以进行粒子检测和歧视。
The dependence on applied electric field ($0 - 40$ kV/cm) of the scintillation light produced by fast electrons and $α$ particles stopped in liquid helium in the temperature range of 0.44 K to 3.12 K is reported. For both types of particles, the reduction in the intensity of the scintillation signal due to the applied field exhibits an apparent temperature dependence. Using an approximate solution of the Debye-Smoluchowski equation, we show that the apparent temperature dependence for electrons can be explained by the time required for geminate pairs to recombine relative to the detector signal integration time. This finding indicates that the spatial distribution of secondary electrons with respect to their geminate partners possesses a heavy, non-Gaussian tail at larger separations, and has a dependence on the energy of the primary ionization electron. We discuss the potential application of this result to pulse shape analysis for particle detection and discrimination.
