An improved measurement of electron-ion recombination in high-pressure xenon gas

We report on results obtained with the NEXT-DEMO prototype of the NEXT-100 high-pressure xenon gas time projection chamber (TPC), filled with pure xenon gas at 10 bar pressure and exposed to an alpha decay calibration source. Compared to our previous measurements with alpha particles, an upgraded de...

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Detalles Bibliográficos
Autores: Serra Díaz-Cano, Luis, Sorel, Michel, Álvarez Puerta, Vicente, Borges, Filipa I.G.M., Camargo, Manuel A., Cárcel García, Sara, Cebrián, Susana, Cervera Villanueva, Anselmo, Conde, Carlos A.N., Dafni, Theopisti, Díaz Medina, José, Esteve, Raúl, Fernandes, L.M.P., Ferrario, Paola, Ferreira, Antonio Luis, Freitas, Elisabete D.C., Gehman, Victor M., Goldschmidt, Azriel, Gómez Cadenas, Juan José, González-Díaz, Diego, Gutiérrez, Rafael María, Hauptman, John M., Hernando Morata, J.A., Herrera, D.C., Irastorza, Igor Garcia, Labarga, Luis A., Laing, Andrew, Liubarsky, Igor, López-March, N., Lorca Galindo, David, Losada, Marta, Luzón, Gloria, Marí, A., Martín-Albo Simón, Justo, Martínez Lema, Gonzalo, Martínez Pérez, Alberto, Miller, Tom P., Monrabal Capilla, Francesc, Monserrate, M., Monteiro, Cristina M.B., Mora, Francisco José, Moutinho, L.M., Muñoz Vidal, J., Nebot Guinot, Miquel, Nygren, David R., Oliveira, Carlos A.B., Pérez, Javier Martin, Pérez Aparicio, J.L., Querol, M., Renner, Joshua, Ripoll Masferrer, Lluís, Rodríguez, Ángel Y., Rodríguez Samaniego, Javier, Santos, Filomena P., dos Santos, Joaquim M.F., Shuman, Derek B., Simón Estévez, Ander, Sofka, C., Toledo, J.F., Torrent Collell, Jordi, Tsamalaidze, Zviadi, Veloso, João F.C.A., Villar, José Ángel, Webb, R.C., White, James T., Yahlali Haddou, Nadia
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2015
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10256/17004
Acceso en línea:http://hdl.handle.net/10256/17004
Access Level:acceso abierto
Palabra clave:Física -- Mesuraments
Physical measurements
Detectors de radiació
Nuclear counters
Ionització
Ionization
Excitació nuclear
Nuclear excitation
Electroluminescència
Electroluminescence
Descripción
Sumario:We report on results obtained with the NEXT-DEMO prototype of the NEXT-100 high-pressure xenon gas time projection chamber (TPC), filled with pure xenon gas at 10 bar pressure and exposed to an alpha decay calibration source. Compared to our previous measurements with alpha particles, an upgraded detector and improved analysis techniques have been used. We measure event-by-event correlated fluctuations between ionization and scintillation due to electron-ion recombination in the gas, with correlation coefficients between −0.80 and −0.56 depending on the drift field conditions. By combining the two signals, we obtain a 2.8% FWHM energy resolution for 5.49 MeV alpha particles and a measurement of the optical gain of the electroluminescent TPC. The improved energy resolution also allows us to measure the specific activity of the radon in the gas due to natural impurities. Finally, we measure the average ratio of excited to ionized atoms produced in the xenon gas by alpha particles to be 0.561± 0.045, translating into an average energy to produce a primary scintillation photon of Wex=(39.2± 3.2) eV

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