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. 2018 Mar 30;120(13):132504.
doi: 10.1103/PhysRevLett.120.132504.

Demonstration of Single-Barium-Ion Sensitivity for Neutrinoless Double-Beta Decay Using Single-Molecule Fluorescence Imaging

A D McDonald  1 , B J P Jones  1 , D R Nygren  1 , C Adams  2 , V Álvarez  3 , C D R Azevedo  4 , J M Benlloch-Rodríguez  3 , F I G M Borges  5 , A Botas  3 , S Cárcel  3 , J V Carrión  3 , S Cebrián  6 , C A N Conde  5 , J Díaz  3 , M Diesburg  7 , J Escada  5 , R Esteve  8 , R Felkai  3 , L M P Fernandes  9 , P Ferrario  3 , A L Ferreira  4 , E D C Freitas  9 , A Goldschmidt  10 , J J Gómez-Cadenas  3 , D González-Díaz  11 , R M Gutiérrez  12 , R Guenette  2 , K Hafidi  13 , J Hauptman  14 , C A O Henriques  9 , A I Hernandez  12 , J A Hernando Morata  11 , V Herrero  8 , S Johnston  13 , L Labarga  15 , A Laing  3 , P Lebrun  7 , I Liubarsky  3 , N López-March  1   3 , M Losada  12 , J Martín-Albo  2 , G Martínez-Lema  11 , A Martínez  3 , F Monrabal  1 , C M B Monteiro  9 , F J Mora  8 , L M Moutinho  4 , J Muñoz Vidal  3 , M Musti  3 , M Nebot-Guinot  3 , P Novella  3 , B Palmeiro  3 , A Para  7 , J Pérez  3 , M Querol  8 , J Repond  13 , J Renner  3 , S Riordan  13 , L Ripoll  16 , J Rodríguez  3 , L Rogers  1 , F P Santos  5 , J M F Dos Santos  9 , A Simón  3 , C Sofka  3 , M Sorel  3 , T Stiegler  17 , J F Toledo  8 , J Torrent  3 , Z Tsamalaidze  18 , J F C A Veloso  4 , R Webb  17 , J T White  17 , N Yahlali  3 ; NEXT Collaboration
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Free article

Demonstration of Single-Barium-Ion Sensitivity for Neutrinoless Double-Beta Decay Using Single-Molecule Fluorescence Imaging

A D McDonald et al. Phys Rev Lett. .
Free article

Abstract

A new method to tag the barium daughter in the double-beta decay of ^{136}Xe is reported. Using the technique of single molecule fluorescent imaging (SMFI), individual barium dication (Ba^{++}) resolution at a transparent scanning surface is demonstrated. A single-step photobleach confirms the single ion interpretation. Individual ions are localized with superresolution (∼2 nm), and detected with a statistical significance of 12.9σ over backgrounds. This lays the foundation for a new and potentially background-free neutrinoless double-beta decay technology, based on SMFI coupled to high pressure xenon gas time projection chambers.

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