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

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arxiv 1711.04782 v3 pith:WIKCWMV4 submitted 2017-11-13 physics.ins-det hep-exnucl-ex

A.D.McDonald , B.J.P. Jones , D.R.Nygren , C. Adams , V.Alvarez , C.D.R. Azevedo , J.M. Benlloch-Rodr{i}guez , F.I.G.M. Borges
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A. Botas S. Carcel J.V. Carrion S. Cebrian C.A.N. Conde J. D{i}az M. Diesburg J. Escada R. Esteve R. Felkai L.M.P. Fernandes P. Ferrario A.L. Ferreira E.D.C. Freitas A. Goldschmidt J.J. Gomez-Cadenas D. Gonzalez-D{i}az R.M. Gutierrez R. Guenette K. Hafidi J. Hauptman C.A.O. Henriques A.I. Hernandez J.A. Hernando Morata V. Herrero S. Johnston L. Labarga A. Laing P. Lebrun I. Liubarsky N. Lopez-March M. Losada J. Mart{i}n-Albo G. Mart{i}nez-Lema A. Mart{i}nez F. Monrabal C.M.B. Monteiro F.J. Mora L.M. Moutinho J. Munoz Vidal M. Musti M. Nebot-Guinot P. Novella B. Palmeiro A. Para J. Perez M. Querol J. Repond J. Renner S. Riordan L. Ripoll J. Rodr{i}guez L. Rogers F.P. Santos J.M.F. dos Santos A. Simon C. Sofka M. Sorel T. Stiegler J.F. Toledo J. Torrent Z. Tsamalaidze J.F.C.A. Veloso R. Webb J.T. White N. Yahlali
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classification physics.ins-dethep-exnucl-ex
keywords singlebariumbetadecaydoubleimagingindividualmolecule
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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 has been demonstrated. A single-step photo-bleach confirms the single ion interpretation. Individual ions are localized with super-resolution ($\sim$2~nm), and detected with a statistical significance of 12.9~$\sigma$ 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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