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Author  |
NEXT Collaboration (Martinez-Lema, G. et al); Ayet, S.; Cid, M.; Cortes-Parra, C.; Kellerer, F.; Lopez-March, N.; Martin-Albo, J.; Martinez-Vara, M.; Novella, P.; Querol, M.; Renner, J.; Romo-Luque, C.; Saharia, P.; Simon, A.; Sorel, M.; Soto-Oton, J.; Teruel-Pardo, S.; Villamil, J.D. |
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Title |
First results of the NEXT-100 detector using 83mKr decays |
Type |
Journal Article |
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Year |
2026 |
Publication |
European Physical Journal C |
Abbreviated Journal |
Eur. Phys. J. C |
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Volume |
86 |
Issue |
7 |
Pages |
739 - 12pp |
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Abstract |
The NEXT collaboration is investigating the double beta decay of 136Xe using high-pressure gas electroluminescent time projection chambers, which provide excellent energy resolution together with a robust topological signature. Operating at the Laboratorio Subterr & aacute;neo de Canfranc (LSC) and building on the success of the NEXT-White detector, the NEXT-100 apparatus began commissioning in May 2024 and started operation with xenon at a pressure of 4 bar in October 2024. We report here the first results obtained with NEXT-100 using low-energy calibration data from 83mKr decays, which allow mapping of the detector response in the active volume and monitoring of its stability over time. After homogenizing the light response, we achieve an energy resolution of 4.37% FWHM at 41.5 keV for 83mKr point-like energy deposits contained in a radius of 425 mm. In a fiducial region representing the operating conditions of NEXT-100 at 10 bar we obtain an improved energy resolution of 4.16% FWHM. These results are in good agreement with that obtained in NEXT-White, and an E-1/2 extrapolation to Q beta beta yields an energy resolution close to 0.5% FWHM, well below the 1% FWHM design target. |
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Address |
[Adams, C.; Bailey, K.; Rogers, L.] Argonne Natl Lab, Argonne, IL 60439 USA, Email: gonzalo.martinez.lema@ific.uv.es; |
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Publisher |
Springer |
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Language |
English |
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Original Title |
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Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1434-6044 |
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Notes |
WOS:001808513300001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7310 |
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