Measurement of the temperature dependence of pulse lengths in an n-type germanium detector

TL;DR

This study measures how pulse lengths in an n-type germanium detector vary with temperature between 77 and 120 K, using 122 keV photons from Eu-152, and finds a Boltzmann-like temperature dependence.

Contribution

It provides the first detailed measurement of pulse length temperature dependence in segmented germanium detectors within this temperature range.

Findings

Pulse length decreases with increasing temperature.

Temperature dependence follows a Boltzmann-like model.

Results improve understanding of detector performance at cryogenic temperatures.

Abstract

The temperature dependence of the pulse length was measured for an 18-fold segmented n-type germanium detector in the temperature range of 77-120 K. The interactions of 122 keV photons originating from a Europium-152 source were selected and pulses as observed on the core and segment electrodes were studied. In both cases, the temperature dependence can be well described by a Boltzmann-like ansatz.