At cryogenic temperatures, however, once an electron or hole, resulting from ionization or from detector leakage current, is trapped in a local defect, it remains trapped for a long time due to the very low thermal energy of the lattice.
In extremely cold conditions, though, if an electron or hole, caused by ionization or detector leakage current, gets caught in a localized flaw, it will remain trapped for a considerable amount of time because of the very low thermal motion within the crystal structure.