@Article{Fernandes_etal2010, author="Fernandes, L. M. P. and Freitas, E. D. C. and Ball, M. and Gomez-Cadenas, J. J. and Monteiro, C. M. B. and Yahlali, N. and Nygren, D. and dos Santos, J. M. F.", title="Primary and secondary scintillation measurements in a Xenon Gas Proportional Scintillation Counter", journal="Journal of Instrumentation", year="2010", publisher="Iop Publishing Ltd", volume="5", pages="P09006 - 15pp", optkeywords="Interaction of radiation with matter; Gaseous detectors; Photon detectors for UV; visible and IR photons (vacuum) (photomultipliers; HPDs; others)", abstract="NEXT is a new experiment to search for neutrinoless double beta decay using a 100 kg radio-pure high-pressure gaseous xenon TPC. The detector requires excellent energy resolution, which can be achieved in a Xe TPC with electroluminescence readout. Hamamatsu R8520-06SEL photomultipliers are good candidates for the scintillation readout. The performance of this photomultiplier, used as VUV photosensor in a gas proportional scintillation counter, was investigated. Initial results for the detection of primary and secondary scintillation produced as a result of the interaction of 5.9 keV X-rays in gaseous xenon, at room temperature and at pressures up to 3 bar, are presented. An energy resolution of 8.0{\%} was obtained for secondary scintillation produced by 5.9 keV X-rays. No significant variation of the primary scintillation was observed for different pressures (1, 2 and 3 bar) and for electric fields up to 0.8 V cm(-1) torr(-1) in the drift region, demonstrating negligible recombination luminescence. A primary scintillation yield of 81 +/- 7 photons was obtained for 5.9 keV X-rays, corresponding to a mean energy of 72 +/- 6 eV to produce a primary scintillation photon in xenon.", optnote="ISI:000283796100003", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=255), last updated on Thu, 24 Feb 2011 10:51:44 +0000", issn="1748-0221", doi="10.1088/1748-0221/5/09/P09006", opturl="http://arxiv.org/abs/1009.2719", opturl="https://doi.org/10.1088/1748-0221/5/09/P09006", archivePrefix="arXiv", eprint="1009.2719", language="English" }