The Junctionless Double-Gate MOSFET combined with a Dual-Material Gate (JL-DMDG) is interesting for future ultra-scaled devices thanks to a simplified technological process (no junctions), reduced leakage currents and capability to reduce short-channel effects and hot-carrier effects (due to the step in the potential profile induced by the dual-material gate). In this work, we investigate the bipolar amplification and charge collection in JL-DMDG submitted to heavy-ion irradiation. The impact on single-event transients of several parameters such as the length of the high-workfunction gate-material region and of the workfunction of the low-workfunction gate-material region is also particularly addressed. We show that JL-DMDG is more sensitive to radiation than more conventional devices with single-material-gate or operating in inversion-mode. (C) 2017 Elsevier Ltd. All rights reserved.