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\bibitem{NEXTCollaborationHenriques_etal2017} NEXT Collaboration(Henriques, C. A. O. et al), Gomez-Cadenas, J. J., Alvarez, V., Benlloch-Rodriguez, J., Botas, A., Carcel, S., et al. (2017). Secondary scintillation yield of xenon with sub-percent levels of CO2 additive for rare-event detection. \textit{Phys. Lett. B}, \textit{773}, 663--671.

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