The NEXT experiment

The NEXT project is an international collaboration that looks for an hypothetical nuclear process called neutrinoless double-beta decay.

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Neutrinoless double beta decay

The NEXT collaboration is looking for the neutrinoless double beta decay of the Xe-136 isotope. Its discovery might help explain the source of the asymmetry between matter and antimatter in the universe.

High-pressure gaseous xenon TPC

The NEXT collaboration is leading the development of the high-pressure gaseous xenon time projection chamber technology.

Barium tagging

The NEXT collaboration is pioneering the detection of Ba++ ions in gaseous xenon, which are emitted by the decay of Xe-136.


  • NEXT at ICHEP 2024

    NEXT at ICHEP 2024

    The NEXT collaboration had a strong presence at the ICHEP 2024 conference in Prague, held from July 18 to 24, 2024. Brais Palmeiro from the University of Manchester delivered a talk summarizing the NEXT research program during the Neutrino Mass session. Three poster were also presented: Congratulations!

  • NEXT-100 assembly completed

    NEXT-100 assembly completed

    The assembly of the NEXT-100 detector is complete! Presently, the detector is working at low pressure to test and calibrate the instrumentation. NEXT-100 employs 60 photomultipliers in the energy plane, compared to the 12 PMTs used in its predecessor, NEXT-White. The tracking plane is made up of 3584 SiPMs (1792 in NEXT-White) meant to provide…

  • Two new papers published

    Two new papers published

    We are very glad to announce that two NEXT papers have been published in two Physical Review Journals by the American Physical Society. You can click on the links attached below to check them out.