Near-intrinsic energy resolution for 30–662 keV gamma rays in a high pressure xenon electroluminescent TPC
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comunitat-uji-handle2:10234/7035
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http://dx.doi.org/10.1016/j.nima.2012.12.123 |
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Title
Near-intrinsic energy resolution for 30–662 keV gamma rays in a high pressure xenon electroluminescent TPCAuthor (s)
Date
2013Publisher
ElsevierISSN
0168-9002Type
info:eu-repo/semantics/articlePublisher version
http://ac.els-cdn.com/S0168900213000181/1-s2.0-S0168900213000181-main.pdf?_tid=e ...Subject
Abstract
We present the design, data and results from the NEXT prototype for Double Beta and Dark Matter (NEXT-DBDM) detector, a high-pressure gaseous natural xenon electroluminescent time projection chamber (TPC) that was ... [+]
We present the design, data and results from the NEXT prototype for Double Beta and Dark Matter (NEXT-DBDM) detector, a high-pressure gaseous natural xenon electroluminescent time projection chamber (TPC) that was built at the Lawrence Berkeley National Laboratory. It is a prototype of the planned NEXT-100 136Xe neutrino-less double beta decay (0νββ) experiment with the main objectives of demonstrating near-intrinsic energy resolution at energies up to 662 keV and of optimizing the NEXT-100 detector design and operating parameters. Energy resolutions of ∼1% FWHM for 662 keV gamma rays were obtained at 10 and 15 atm and ∼5% FWHM for 30 keV fluorescence xenon X-rays. These results demonstrate that 0.5% FWHM resolutions for the 2459 keV hypothetical neutrino-less double beta decay peak are realizable. This energy resolution is a factor 7–20 better than that of the current leading 0νββ experiments using liquid xenon and thus represents a significant advancement. We present also first results from a track imaging system consisting of 64 silicon photo-multipliers recently installed in NEXT–DBDM that, along with the excellent energy resolution, demonstrates the key functionalities required for the NEXT-100 0νββ search. [-]
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2013, Abril, Vol. 708Rights
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info:eu-repo/semantics/restrictedAccess
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