Charge-carrier collective motion in germanium detectors for beta beta-decay searches

The time analysis of the signal induced by the drift of charge carriers in high purity germanium detectors provides information on the event topology. Millions of charge carriers are produced in a typical event. Their initial distribution, stochastic diffusion and Coulomb self-repulsion affect the time structure of the signal. We present a comprehensive study of these effects and evaluate their impact on the event discrimination capabilities for the three geometries which will be used in the Legend experiment for neutrinoless double-beta decay.

Automated summary

The time analysis of signals induced by charge carrier drift in high purity germanium detectors provides information about event topology. With millions of charge carriers produced in a typical event, their initial distribution, diffusion and Coulomb repulsion impact the time structure of the signal. Through a comprehensive study of these effects, their impact on event discrimination capabilities for three geometries in the Legend experiment for neutrinoless double-beta decay is evaluated.