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Ba+2 ion trapping using organic submonolayer for ultra-low background neutrinoless double beta detector

2022; Nature Portfolio; Volume: 13; Issue: 1 Linguagem: Inglês

10.1038/s41467-022-35153-0

2041-1723

Pablo Herrero, Jan Patrick Calupitan, M. Ilyn, Alejandro Berdonces‐Layunta, Tao Wang, Dimas G. de Oteyza, Martina Corso, R. González-Moreno, Iván Rivilla, B. Aparicio, A.I. Aranburu, Zoraida Freixa, F. Monrabal, Fernando P. Cossío, J.J. Gómez-Cadenas, Celia Rogero, C. Adams, H. Almazán, V. Álvarez, L. Arazi, I. J. Arnquist, S. Ayet, C.D.R. Azevedo, K. Bailey, F. Ballester, J. M. Benlloch-Rodríguez, F.I.G.M. Borges, S. Bounasser, N. Byrnes, S. Cárcel, J.V. Carríon, S. Cebrián, E. Church, C.A.N. Conde, T. Contreras, A. A. Denisenko, E. Dey, G. A. Díaz, T. Dickel, J. Escada, R. Esteve, A. Fahs, R. Felkai, L. M. P. Fernandes, P. Ferrario, A. L. Ferreira, Frank W. Foss, E.D.C. Freitas, Zoraida Freixa, J. Generowicz, A. Goldschmidt, R. González-Moreno, R. Guénette, J. Haefner, K. Hafidi, J. M. Hauptman, C. A. O. Henriques, J. A. Hernando Morata, V. Herrero, J. Ho, Paul T. P. Ho, Y. Ifergan, B. J. P. Jones, M. Kekic, L. Labarga, L. Larizgoitia, P. Lebrun, D. Lopez Gutierrez, N. López-March, R. Madigan, R. D. P. Mano, J. Martín-Albo, G. Martínez-Lema, M. Martínez-Vara, Z.-E. Meziani, R. Miller, K. Mistry, C. M. B. Monteiro, Francisco Mora, J. Muñoz Vidal, K. Navarro, P. Novella, A. Nuñez, D. R. Nygren, E. Oblak, Mikel Odriozola‐Gimeno, B. Palmeiro, A. Para, M. Querol, A. B. Redwine, J. Renner, L. Ripoll, J. Rodríguez, L. Rogers, B. Romeo, C. Romo-Luque, F.P. Santos, J.M.F. dos Santos, A. Simón, M. Sorel, C. Stanford, J. M. R. Teixeira, J.F. Toledo, J. Torrent, A. Usón, J.F.C.A. Veloso, T. T. Vuong, J. Waiton, James T. White,

Radiation Detection and Scintillator Technologies

If neutrinos are their own antiparticles the otherwise-forbidden nuclear reaction known as neutrinoless double beta decay can occur. The very long lifetime expected for these exceptional events makes its detection a daunting task. In order to conduct an almost background-free experiment, the NEXT collaboration is investigating novel synthetic molecular sensors that may capture the Ba dication produced in the decay of certain Xe isotopes in a high-pressure gas experiment. The use of such molecular detectors immobilized on surfaces must be explored in the ultra-dry environment of a xenon gas chamber. Here, using a combination of highly sensitive surface science techniques in ultra-high vacuum, we demonstrate the possibility of employing the so-called Fluorescent Bicolor Indicator as the molecular component of the sensor. We unravel the ion capture process for these molecular indicators immobilized on a surface and explain the origin of the emission fluorescence shift associated to the ion trapping.