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\bibitem{NEXTCollaborationMcDonald_etal2019} NEXT Collaboration(McDonald, A. D. et al), Alvarez, V., Benlloch-Rodriguez, J. M., Carcel, S., Carrion, J. V., Diaz, J., et al. (2019). Electron drift and longitudinal diffusion in high pressure xenon-helium gas mixtures. \textit{J. Instrum.}, \textit{14}, P08009--19pp.

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