TY  - JOUR
AU  - NEXT Collaboration (Henriques, C. A. O. et al
AU  - Gomez-Cadenas, J. J.
AU  - Alvarez, V.
AU  - Benlloch-Rodriguez, J.
AU  - Botas, A.
AU  - Carcel, S.
AU  - Carrion, J. V.
AU  - Diaz, J.
AU  - Felkai, R.
AU  - Ferrario, P.
AU  - Laing, A.
AU  - Liubarsky, I.
AU  - Lopez-March, N.
AU  - Martin-Albo, J.
AU  - Martinez, A.
AU  - Muñoz Vidal, J.
AU  - Musti, M.
AU  - Nebot-Guinot, M.
AU  - Novella, P.
AU  - Palmeiro, B.
AU  - Perez, J.
AU  - Querol, M.
AU  - Renner, J.
AU  - Rodriguez, J.
AU  - Serra, L.
AU  - Simon, A.
AU  - Sorel, M.
AU  - Torrent, J.
AU  - Yahlali, N.
PY  - 2017
DA  - 2017//
TI  - Secondary scintillation yield of xenon with sub-percent levels of CO2 additive for rare-event detection
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 663
EP  - 671
VL  - 773
PB  - Elsevier Science Bv
KW  - Double beta decay
KW  - Neutrino
KW  - Rare event detection
KW  - Electroluminescence
KW  - Secondary scintillation
KW  - Xenon
AB  - Xe-CO2 mixtures are important alternatives to pure xenon in Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification with applications in the important field of rare event detection such as directional dark matter, double electron capture and double beta decay detection. The addition of CO2 to pure xenon at the level of 0.05-0.1% can reduce significantly the scale of electron diffusion from 10 mm/root m to 2.5 mm/root m, with high impact on the discrimination of the events through pattern recognition of the topology of primary ionization trails. We have measured the electroluminescence (EL) yield of Xe-CO2 mixtures, with sub-percent CO2 concentrations. We demonstrate that the EL production is still high in these mixtures, 70% and 35% relative to that produced in pure xenon, for CO2 concentrations around 0.05% and 0.1%, respectively. The contribution of the statistical fluctuations in EL production to the energy resolution increases with increasing CO2 concentration, being smaller than the contribution of the Fano factor for concentrations below 0.1% CO2.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1704.01623
UR  - https://doi.org/10.1016/j.physletb.2017.09.017
DO  - 10.1016/j.physletb.2017.09.017
LA  - English
N1  - WOS:000413294200099
ID  - NEXTCollaborationHenriques_etal2017
ER  -