This paper is dedicated to the simulation of the so-called trapping-effect observed in the Troitsk nu-mass experiment. The effect is caused by the magnetic trapping of decay electrons in the windowless gaseous tritium source and the gradual evaporation of those electrons. As a result, alongside regular tritium beta-spectrum electrons, we see additional electrons that are initially trapped in the source and escape it with changed energy. The spectrum of evaporated electrons is quite peculiar (almost flat for monochromatic initial electrons) and could not be directly measured in the experiment. So one has to rely on simulations. Also, it is possible that the same effect could be observed in other cases of magnetic traps.

本文致力于模拟在 Troitsk nu-mass 实验中观察到的所谓捕获效应。该效应是由无窗气态氚源中衰变电子的磁捕获和这些电子的逐渐蒸发引起的。结果，除了常规的氚 β 谱电子之外，我们还看到了最初被困在源中并以改变的能量逃逸的额外电子。蒸发电子的光谱非常奇特（对于单色初始电子几乎是平坦的），无法在实验中直接测量。所以必须依靠模拟。此外，在其他磁阱情况下也可能观察到相同的效果。