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1. Performance of an Optical TPC Geant4 Simulation with Opticks GPU-Accelerated Photon Propagation

Author

NEXT Collaboration, Parmaksiz, I., Mistry, K., Church, E., Adams, C., Asaadi, J., Baeza-Rubio, J., Bailey, K., Byrnes, N., Jones, B. J. P., Moya, I. A., Navarro, K. E., Nygren, D. R., Oyedele, P., Rogers, L., Samaniego, F., Stogsdill, K., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Brodolin, A., Cárcel, S., Castillo, A., Cid, L., Conde, C. A. N., Contreras, T., Cossío, F. P., Coupe, R., Dey, E., Díaz, G., Echevarria, C., Elorza, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freixa, Z., García-Barrena, J., Gómez-Cadenas, J. J., Grocott, J. W. R., Guenette, R., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ifergan, Y., Kellerer, F., Larizgoitia, L., Larumbe, A., Lebrun, P., Lopez, F., López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Miller, R. L., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Novella, P., Nuñez, A., Oblak, E., Palacio, J., Palmeiro, B., Para, A., Pazos, A., Pelegrin, J., Maneiro, M. Pérez, Querol, M., Renner, J., Rivilla, I., Rogero, C., Romeo, B., Romo-Luque, C., Nacienciano, V. San, Santos, F. P., Santos, J. M. F. dos, Seemann, M., Shomroni, I., Silva, P. A. O. C., Simón, A., Soleti, S. R., Sorel, M., Soto-Oton, J., Teixeira, J. M. R., Teruel-Pardo, S., Toledo, J. F., Tonnelé, C., Torelli, S., Torrent, J., Trettin, A., Usón, A., Valle, P. R. G., Veloso, J. F. C. A., Waiton, J., and Yubero-Navarro, A.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We investigate the performance of Opticks, an NVIDIA OptiX API 7.5 GPU-accelerated photon propagation compared with a single-threaded Geant4 simulation. We compare the simulations using an improved model of the NEXT-CRAB-0 gaseous time projection chamber. Performance results suggest that Opticks improves simulation speeds by between $58.47\pm{0.02}$ and $181.39\pm{0.28}$ times relative to a CPU-only Geant4 simulation and these results vary between different types of GPU and CPU. A detailed comparison shows that the number of detected photons, along with their times and wavelengths, are in good agreement between Opticks and Geant4., Comment: 12 pages, 8 Figures

Published
2025

2. Reconstructing neutrinoless double beta decay event kinematics in a xenon gas detector with vertex tagging

Author

NEXT Collaboration, Martínez-Vara, M., Mistry, K., Pompa, F., Jones, B. J. P., Martín-Albo, J., Sorel, M., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Brodolin, A., Byrnes, N., Cárcel, S., Castillo, A., Church, E., Cid, L., Conde, C. A. N., Contreras, T., Cossío, F. P., Coupe, R., Dey, E., Díaz, G., Echevarria, C., Elorza, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freixa, Z., García-Barrena, J., Gómez-Cadenas, J. J., Grocott, J. W. R., Guenette, R., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ifergan, Y., Kellerer, F., Larizgoitia, L., Larumbe, A., Lebrun, P., Lopez, F., López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martínez-Lema, G., Miller, R. L., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Navarro, K. E., Novella, P., Nuñez, A., Nygren, D. R., Oblak, E., Palacio, J., Palmeiro, B., Para, A., Parmaksiz, I., Pazos, A., Pelegrin, J., Maneiro, M. Pérez, Querol, M., Renner, J., Rivilla, I., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Nacienciano, V. San, Santos, F. P., Santos, J. M. F. dos, Seemann, M., Shomroni, I., Silva, P. A. O. C., Simón, A., Soleti, S. R., Soto-Oton, J., Teixeira, J. M. R., Teruel-Pardo, S., Toledo, J. F., Tonnelé, C., Torelli, S., Torrent, J., Trettin, A., Usón, A., Valle, P. R. G., Veloso, J. F. C. A., Waiton, J., and Yubero-Navarro, A.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

If neutrinoless double beta decay is discovered, the next natural step would be understanding the lepton number violating physics responsible for it. Several alternatives exist beyond the exchange of light neutrinos. Some of these mechanisms can be distinguished by measuring phase-space observables, namely the opening angle $\cos\theta$ among the two decay electrons, and the electron energy spectra, $T_1$ and $T_2$. In this work, we study the statistical accuracy and precision in measuring these kinematic observables in a future xenon gas detector with the added capability to precisely locate the decay vertex. For realistic detector conditions (a gas pressure of 10 bar and spatial resolution of 4 mm), we find that the average $\overline{\cos\theta}$ and $\overline{T_1}$ values can be reconstructed with a precision of 0.19 and 110 keV, respectively, assuming that only 10 neutrinoless double beta decay events are detected., Comment: 19 pages, 8 figures

Published
2025

3. Measurement of Energy Resolution with the NEXT-White Silicon Photomultipliers

Author

Contreras, T., Palmeiro, B., Almazán, H., Para, A., Martínez-Lema, G., Guenette, R., Adams, C., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Brodolin, A., Byrnes, N., Cárcel, S., Castillo, A., Cebrián, S., Church, E., Cid, L., Conde, C. A. N., Cossío, F. P., Dey, E., Díaz, G., Dickel, T., Echevarria, C., Elorza, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freixa, Z., García-Barrena, J., Gómez-Cadenas, J. J., González, R., Grocott, J. W. R., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ifergan, Y., Jones, B. J. P., Kellerer, F., Larizgoitia, L., Larumbe, A., Lebrun, P., Lopez, F., López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Vara, M., Miller, R. L., Mistry, K., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Navarro, K. E., Novella, P., Nuñez, A., Nygren, D. R., Oblak, E., Palacio, J., Parmaksiz, I., Pazos, A., Pelegrin, J., Maneiro, M. Pérez, Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Seemann, M., Shomroni, I., Silva, P. A. O. C., Simón, A., Soleti, S. R., Sorel, M., Soto-Oton, J., Teixeira, J. M. R., Teruel-Pardo, S., Toledo, J. F., Tonnelé, C., Torrent, J., Trettin, A., Usón, A., Valle, P. R. G., Veloso, J. F. C. A., Waiton, J., and Yubero-Navarro, A.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The NEXT-White detector, a high-pressure gaseous xenon time projection chamber, demonstrated the excellence of this technology for future neutrinoless double beta decay searches using photomultiplier tubes (PMTs) to measure energy and silicon photomultipliers (SiPMs) to extract topology information. This analysis uses $^{83m}\text{Kr}$ data from the NEXT-White detector to measure and understand the energy resolution that can be obtained with the SiPMs, rather than with PMTs. The energy resolution obtained of (10.9 $\pm$ 0.6) $\%$, full-width half-maximum, is slightly larger than predicted based on the photon statistics resulting from very low light detection coverage of the SiPM plane in the NEXT-White detector. The difference in the predicted and measured resolution is attributed to poor corrections, which are expected to be improved with larger statistics. Furthermore, the noise of the SiPMs is shown to not be a dominant factor in the energy resolution and may be negligible when noise subtraction is applied appropriately, for high-energy events or larger SiPM coverage detectors. These results, which are extrapolated to estimate the response of large coverage SiPM planes, are promising for the development of future, SiPM-only, readout planes that can offer imaging and achieve similar energy resolution to that previously demonstrated with PMTs.

Published
2024

4. Fluorescence Imaging of Individual Ions and Molecules in Pressurized Noble Gases for Barium Tagging in $^{136}$Xe

Author

NEXT Collaboration, Byrnes, N., Dey, E., Foss, F. W., Jones, B. J. P., Madigan, R., McDonald, A., Miller, R. L., Navarro, K. E., Norman, L. R., Nygren, D. R., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Barcelon, J. E., Bailey, K., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Brodolin, A., Cárcel, S., Castillo, A., Cebrián, S., Church, E., Cid, L., Conde, C. A. N., Contreras, T., Cossío, F. P., Díaz, G., Dickel, T., Echevarria, C., Elorza, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freixa, Z., García-Barrena, J., Gómez-Cadenas, J. J., González, R., Grocott, J. W. R., Guenette, R., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ho, P., Ifergan, Y., Kellerer, F., Larizgoitia, L., Larumbe, A., Lebrun, P., Lopez, F., López-March, N., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Mistry, K., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Novella, P., Nuñez, A., Oblak, E., Palacio, J., Palmeiro, B., Para, A., Parmaksiz, I., Pazos, A., Pelegrin, J., Maneiro, M. Pérez, Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Seemann, M., Shomroni, I., Silva, P. A. O. C., Simón, A., Soleti, S. R., Sorel, M., Soto-Oton, J., Teixeira, J. M. R., Teruel-Pardo, S., Toledo, J. F., Tonnelé, C., Torrent, J., Trettin, A., Usón, A., Valle, P. R. G., Veloso, J. F. C. A., Waiton, J., and Yubero-Navarro, A.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

The imaging of individual Ba$^{2+}$ ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba$^{2+}$ ion imaging inside a high-pressure xenon gas environment. Ba$^{2+}$ ions chelated with molecular chemosensors are resolved at the gas-solid interface using a diffraction-limited imaging system with scan area of 1$\times$1~cm$^2$ located inside 10~bar of xenon gas. This new form of microscopy represents an important enabling step in the development of barium tagging for neutrinoless double beta decay searches in $^{136}$Xe, as well as a new tool for studying the photophysics of fluorescent molecules and chemosensors at the solid-gas interface.

Published
2024

5. Design, characterization and installation of the NEXT-100 cathode and electroluminescence regions

Author

NEXT Collaboration, Mistry, K., Rogers, L., Jones, B. J. P., Munson, B., Norman, L., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Brodolin, A., Byrnes, N., Cárcel, S., Castillo, A., Cebrián, S., Church, E., Cid, L., Conde, C. A. N., Contreras, T., Cossío, F. P., Dey, E., Díaz, G., Dickel, T., Echevarria, C., Elorza, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Gómez-Cadenas, J. J., González, R., Grocott, J. W. R., Guenette, R., Hafidi, K., Hauptman, J., Henriques, C. A. O., Hernando~Morata, J. A., Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ifergan, Y., Larizgoitia, L., Larumbe, A., Lebrun, P., Lopez, F., López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Meziani, Z. E., Miller, R. L., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Navarro, K. E., Novella, P., Nuñez, A., Nygren, D. R., Oblak, E., Oliver, D., Palacio, J., Palmeiro, B., Para, A., Parmaksiz, I., Pelegrin, J., Maneiro, M. Pérez, Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rogero, C., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Seemann, M., Shomroni, I., Simón, A., Soleti, S. R., Sorel, M., Soto-Oton, J., Teixeira, J. M. R., Toledo, J. F., Torrent, J., Trettin, A., Usón, A., Veloso, J. F. C. A., Waiton, J., and Yubero, A.

Subjects
Physics - Instrumentation and Detectors
Abstract

NEXT-100 is currently being constructed at the Laboratorio Subterr\'aneo de Canfranc in the Spanish Pyrenees and will search for neutrinoless double beta decay using a high-pressure gaseous time projection chamber (TPC) with 100 kg of xenon. Charge amplification is carried out via electroluminescence (EL) which is the process of accelerating electrons in a high electric field region causing secondary scintillation of the medium proportional to the initial charge. The NEXT-100 EL and cathode regions are made from tensioned hexagonal meshes of 1 m diameter. This paper describes the design, characterization, and installation of these parts for NEXT-100. Simulations of the electric field are performed to model the drift and amplification of ionization electrons produced in the detector under various EL region alignments and rotations. Measurements of the electrostatic breakdown voltage in air characterize performance under high voltage conditions and identify breakdown points. The electrostatic deflection of the mesh is quantified and fit to a first-principles mechanical model. Measurements were performed with both a standalone test EL region and with the NEXT-100 EL region before its installation in the detector. Finally, we describe the parts as installed in NEXT-100, following their deployment in Summer 2023., Comment: 35 pages, 25 Figures, update includes accepted version in JINST

Published
2023
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6. Demonstration of Event Position Reconstruction based on Diffusion in the NEXT-White Detector

Author

Haefner, J., Navarro, K. E., Guenette, R., Jones, B. J. P., Tripathi, A., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., BenllochRodríguez, J. M., Borges, F. I. G. M., Brodolin, A., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Cid, L., Conde, C. A. N., Contreras, T., Cossío, F. P., Dey, E., Díaz, G., Dickel, T., Elorza, M., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., Grocott, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ifergan, Y., Labarga, L., Larizgoitia, L., Larumbe, A., Lebrun, P., Lopez, F., López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Meziani, Z. E., Miller, R. L., Mistry, K., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nuñez, A., Nygren, D. R., Oblak, E., Palacio, J., Palmeiro, B., Para, A., Parmaksiz, I., Pelegrin, J., Maneiro, M. Pérez, Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Shomroni, I., Simón, A., Soleti, S. R., Sorel, M., Soto-Oton, J., Teixeira, J. M. R., Toledo, J. F., Torrent, J., Trettin, A., Usón, A., Veloso, J. F. C. A., Waiton, J., and White, J. T.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

Noble element time projection chambers are a leading technology for rare event detection in physics, such as for dark matter and neutrinoless double beta decay searches. Time projection chambers typically assign event position in the drift direction using the relative timing of prompt scintillation and delayed charge collection signals, allowing for reconstruction of an absolute position in the drift direction. In this paper, alternate methods for assigning event drift distance via quantification of electron diffusion in a pure high pressure xenon gas time projection chamber are explored. Data from the NEXT-White detector demonstrate the ability to achieve good position assignment accuracy for both high- and low-energy events. Using point-like energy deposits from $^{83\mathrm{m}}$Kr calibration electron captures ($E\sim45$keV), the position of origin of low-energy events is determined to $2~$cm precision with bias $< 1$mm. A convolutional neural network approach is then used to quantify diffusion for longer tracks (E$\geq$1.5MeV), yielding a precision of 3cm on the event barycenter. The precision achieved with these methods indicates the feasibility energy calibrations of better than 1% FWHM at Q$_{\beta\beta}$ in pure xenon, as well as the potential for event fiducialization in large future detectors using an alternate method that does not rely on primary scintillation., Comment: 18 pages, 16 figures

Published
2023

7. Demonstration of event position reconstruction based on diffusion in the NEXT-white detector

Author

Haefner, J, Navarro, KE, Guenette, R, Jones, BJP, Tripathi, A, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Auria-Luna, F, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Barrio-Torregrosa, M del, Bayo, A, Benlloch-Rodríguez, JM, Borges, FIGM, Brodolin, A, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Cid, L, Conde, CAN, Contreras, T, Cossío, FP, Dey, E, Díaz, G, Dickel, T, Elorza, M, Escada, J, Esteve, R, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, FW, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, Grocott, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Hervés Carrete, C, Ifergan, Y, Labarga, L, Larizgoitia, L, Larumbe, A, Lebrun, P, Lopez, F, López-March, N, Madigan, R, Mano, RDP, Marques, AP, Martín-Albo, J, Martínez-Lema, G, Martínez-Vara, M, Meziani, ZE, Miller, RL, Mistry, K, Molina-Canteras, J, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Novella, P, Nuñez, A, Nygren, DR, Oblak, E, Palacio, J, Palmeiro, B, Para, A, Parmaksiz, I, Pelegrin, J, Pérez Maneiro, M, Querol, M, Redwine, AB, Renner, J, Rivilla, I, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Shomroni, I, and Simón, A

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
Abstract

Noble element time projection chambers are a leading technology for rare event detection in physics, such as for dark matter and neutrinoless double beta decay searches. Time projection chambers typically assign event position in the drift direction using the relative timing of prompt scintillation and delayed charge collection signals, allowing for reconstruction of an absolute position in the drift direction. In this paper, alternate methods for assigning event drift distance via quantification of electron diffusion in a pure high pressure xenon gas time projection chamber are explored. Data from the NEXT-White detector demonstrate the ability to achieve good position assignment accuracy for both high- and low-energy events. Using point-like energy deposits from 83mKr calibration electron captures (E∼45 keV), the position of origin of low-energy events is determined to 2 cm precision with bias

Published
2024

8. Demonstration of neutrinoless double beta decay searches in gaseous xenon with NEXT

Author

NEXT Collaboration, Novella, P., Sorel, M., Usón, A., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Cid, L., Conde, C. A. N., Contreras, T., Cossío, F. P., Dey, E., Díaz, G., Dickel, T., Elorza, M., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., Grocott, J., Guenette, R., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ho, J., Ho, P., Ifergan, Y., Jones, B. J. P., Labarga, L., Larizgoitia, L., Larumbe, A., Lebrun, P., Lopez, F., Gutierrez, D. Lopez, López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Meziani, Z. E., Miller, R. L., Mistry, K., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Navarro, K. E., Nuñez, A., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palacio, J., Palmeiro, B., Para, A., Parmaksiz, I., Pelegrin, J., Maneiro, M. Pérez, Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Soleti, S. R., Stanford, C., Teixeira, J. M. R., Toledo, J. F., Torrent, J., Veloso, J. F. C. A., Vuong, T. T., Waiton, J., and White, J. T.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

The NEXT experiment aims at the sensitive search of the neutrinoless double beta decay in $^{136}$Xe, using high-pressure gas electroluminescent time projection chambers. The NEXT-White detector is the first radiopure demonstrator of this technology, operated in the Laboratorio Subterr\'aneo de Canfranc. Achieving an energy resolution of 1% FWHM at 2.6 MeV and further background rejection by means of the topology of the reconstructed tracks, NEXT-White has been exploited beyond its original goals in order to perform a neutrinoless double beta decay search. The analysis considers the combination of 271.6 days of $^{136}$Xe-enriched data and 208.9 days of $^{136}$Xe-depleted data. A detailed background modeling and measurement has been developed, ensuring the time stability of the radiogenic and cosmogenic contributions across both data samples. Limits to the neutrinoless mode are obtained in two alternative analyses: a background-model-dependent approach and a novel direct background-subtraction technique, offering results with small dependence on the background model assumptions. With a fiducial mass of only 3.50$\pm$0.01 kg of $^{136}$Xe-enriched xenon, 90% C.L. lower limits to the neutrinoless double beta decay are found in the T$_{1/2}^{0\nu}>5.5\times10^{23}-1.3\times10^{24}$ yr range, depending on the method. The presented techniques stand as a proof-of-concept for the searches to be implemented with larger NEXT detectors.

Published
2023
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9. NEXT-CRAB-0: A High Pressure Gaseous Xenon Time Projection Chamber with a Direct VUV Camera Based Readout

Author

NEXT Collaboration, Byrnes, N. K., Parmaksiz, I., Adams, C., Asaadi, J., Baeza-Rubio, J, Bailey, K., Church, E., González-Díaz, D., Higley, A., Jones, B. J. P., Mistry, K., Moya, I. A., Nygren, D. R., Oyedele, P., Rogers, L., Stogsdill, K., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Ballester, F., del Barrio-Torregrosa, M., Bayo, A., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Cárcel, S., Carrión, J. V., Cebrián, S., Cid, L., Conde, C. A. N., Contreras, T., Cossío, F. P., Dey, E., Díaz, G., Dickel, T., Elorza, M., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., Grocott, J., Guenette, R., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ho, J., Ho, P., Ifergan, Y., Labarga, L., Larizgoitia, L., Lebrun, P., Lopez, F, Gutierrez, D. Lopez, López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Meziani, Z. E., Miller, R. L., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Navarro, K. E., Novella, P., Nuñez, A., Oblak, E., Odriozola-Gimeno, M., Palacio, J., Palmeiro, B., Para, A., Pelegrin, J, Maneiro, M. Pérez, Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rodríguez, J., Rogero, C., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Soleti, S. R., Sorel, M., Stanford, C., Teixeira, J. M. R., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Waiton, J., and White, J. T.

Subjects
Physics - Instrumentation and Detectors
Abstract

The search for neutrinoless double beta decay ($0\nu\beta\beta$) remains one of the most compelling experimental avenues for the discovery in the neutrino sector. Electroluminescent gas-phase time projection chambers are well suited to $0\nu\beta\beta$ searches due to their intrinsically precise energy resolution and topological event identification capabilities. Scalability to ton- and multi-ton masses requires readout of large-area electroluminescent regions with fine spatial resolution, low radiogenic backgrounds, and a scalable data acquisition system. This paper presents a detector prototype that records event topology in an electroluminescent xenon gas TPC via VUV image-intensified cameras. This enables an extendable readout of large tracking planes with commercial devices that reside almost entirely outside of the active medium.Following further development in intermediate scale demonstrators, this technique may represent a novel and enlargeable method for topological event imaging in $0\nu\beta\beta$., Comment: 30 Pages, 22 figures, Updated to match current JINST submission

Published
2023

10. A Compact Dication Source for Ba$^{2+}$ Tagging and Heavy Metal Ion Sensor Development

Author

Navarro, K. E., Jones, B. J. P., Baeza-Rubio, J., Boyd, M., Denisenko, A. A., Foss, F. W., Giri, S., Miller, R., Nygren, D. R., Tiscareno, M. R., Samaniego, F. J., Stogsdill, K., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Dey, E., Díaz, G., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., Grocott, J., Guenette, R., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Carrete, C. Hervés, Ho, J., Ho, P., Ifergan, Y., Labarga, L., Larizgoitia, L., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Madigan, R., Mano, R. D. P., Marques, A. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Meziani, Z. E., Mistry, K., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Nuñez, A., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pelegrín, J., Maneiro, M. Pérez, Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stanford, C., Teixeira, J. M. R., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Waiton, J., and White, J. T.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Nuclear Experiment
Abstract

We present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the retention time in the ionization region. Barium, lead, and cobalt samples have been used to test the system, with ion currents identified and quantified using a quadrupole mass analyzer. Realization of a clean $\mathrm{Ba^{2+}}$ ion beam within a bench-top system represents an important technical advance toward the development and characterization of barium tagging systems for neutrinoless double beta decay searches in xenon gas. This system also provides a testbed for investigation of novel ion sensing methodologies for environmental assay applications, with dication beams of Pb$^{2+}$ and Cd$^{2+}$ also demonstrated for this purpose.

Published
2023
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11. Reflectance and fluorescence characteristics of PTFE coated with TPB at visible, UV, and VUV as a function of thickness

Author

Haefner, J., Fahs, A., Ho, J., Stanford, C., Guenette, R., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Auria-Luna, F., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Denisenko, A. A., Dey, E., Díaz, G., Dickel, T., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., Grocott, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Ho, P., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Larizgoitia, L., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Madigan, R., Mano, R. D. P., Martín-Albo, J., Martínez-Lema, G., Martínez-Vara, M., Marques, A. P., Meziani, Z. E., Miller, R., Mistry, K., Molina-Canteras, J., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Navarro, K., Novella, P., Nuñez, A., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Querol, M., Redwine, A. B., Renner, J., Rivilla, I., Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Teixeira, J. M. R., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., and Waiton, J.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Physics - Optics
Abstract

Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. In noble element systems, it is often coated with tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200~nm, 260~nm, and 450~nm. The results show that TPB-coated PTFE has a reflectance of approximately 92\% for thicknesses ranging from 5~mm to 10~mm at 450~nm, with negligible variation as a function of thickness within this range. A cross-check of these results using an argon chamber supports the conclusion that the change in thickness from 5~mm to 10~mm does not affect significantly the light response at 128~nm. Our results indicate that pieces of TPB-coated PTFE thinner than the typical 10~mm can be used in particle physics detectors without compromising the light signal.

Published
2022
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12. Reflectance and fluorescence characteristics of PTFE coated with TPB at visible, UV, and VUV as a function of thickness

Author

Haefner, J, Fahs, A, Ho, J, Stanford, C, Guenette, R, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Auria-Luna, F, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Bounasser, S, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Denisenko, AA, Dey, E, Díaz, G, Dickel, T, Escada, J, Esteve, R, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, FW, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, Grocott, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Ho, P, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Larizgoitia, L, Lebrun, P, Gutierrez, D Lopez, López-March, N, Madigan, R, Mano, RDP, Martín-Albo, J, Martínez-Lema, G, Martínez-Vara, M, Marques, AP, Meziani, ZE, Miller, R, Mistry, K, Molina-Canteras, J, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, J Muñoz, Navarro, K, Novella, P, Nuñez, A, Nygren, DR, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Querol, M, Redwine, AB, Renner, J, Rivilla, I, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sorel, M, Teixeira, JMR, Toledo, JF, Torrent, J, and Usón, A

Subjects
Nuclear and Plasma Physics, Physical Sciences, Engineering, Nuclear & Particles Physics, Physical sciences
Abstract

Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. In noble element systems, it is often coated with tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200 nm, 260 nm, and 450 nm. The results show that TPB-coated PTFE has a reflectance of approximately 92% for thicknesses ranging from 5 mm to 10 mm at 450 nm, with negligible variation as a function of thickness within this range. A cross-check of these results using an argon chamber supports the conclusion that the change in thickness from 5 mm to 10 mm does not affect significantly the light response at 128 nm. Our results indicate that pieces of TPB-coated PTFE thinner than the typical 10 mm can be used in particle physics detectors without compromising the light signal.

Published
2023

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

Author

Herrero-Gómez, P, Calupitan, JP, Ilyn, M, Berdonces-Layunta, A, Wang, T, de Oteyza, DG, Corso, M, González-Moreno, R, Rivilla, I, Aparicio, B, Aranburu, AI, Freixa, Z, Monrabal, F, Cossío, FP, Gómez-Cadenas, JJ, and Rogero, C

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, NEXT collaboration
Abstract

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.

Published
2022

14. Ba$^{2+}$ ion trapping by organic submonolayer: towards an ultra-low background neutrinoless double beta decay detector

Author

Herrero-Gómez, P., Calupitan, J. P., Ilyn, M., Berdonces-Layunta, A., Wang, T., de Oteyza, D. G., Corso, M., González-Moreno, R., Rivilla, I., Aparicio, B., Aranburu, A. I., Freixa, Z., Monrabal, F., Cossío, F. P., Gómez-Cadenas, J. J., Rogero, C., Adams, C., Almazán, H., Alvarez, V., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Denisenko, A. A., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Generowicz, J., Goldschmidt, A., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, V., Ho, J., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Larizgoitia, L., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A. D., Meziani, Z. E., Mistry, K., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Navarro, K., Novella, P., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Raymond, A., Redwine, A. B., Renner, J., Ripoll, L., García, Y. Rodríguez, Rodríguez, J., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Webb, R., White, J. T., Woodruff, K., and Yahlali, N.

Subjects
High Energy Physics - Experiment, Condensed Matter - Materials Science, Physics - Chemical Physics
Abstract

If neutrinos are their own antiparticles, the otherwise-forbidden nuclear reaction known as neutrinoless double beta decay ($\beta\beta 0\nu$) can occur, with a characteristic lifetime which is expected to be very long, making the suppression of backgrounds a daunting task. It has been shown that detecting (``tagging'') the Ba$^{+2}$ dication produced in the double beta decay ${}^{136}\mathrm{Xe} \rightarrow {}^{136}$Ba$^{+2}+ 2 e + (2 \nu)$ in a high pressure gas experiment, could lead to a virtually background free experiment. To identify these \Bapp, chemical sensors are being explored as a key tool by the NEXT collaboration . Although used in many fields, the application of such chemosensors to the field of particle physics is totally novel and requires experimental demonstration of their suitability in the ultra-dry environment of a xenon gas chamber. Here we use a combination of complementary surface science techniques to unambiguously show that Ba$^{+2}$ ions can be trapped (chelated) in vacuum by an organic molecule, the so-called fluorescent bicolour indicator (FBI) (one of the chemosensors developed by NEXT), immobilized on a surface. We unravel the ion capture mechanism once the molecules are immobilised on Au(111) surface and explain the origin of the emission fluorescence shift associated to the trapping of different ions. Moreover, we prove that chelation also takes place on a technologically relevant substrate, as such, demonstrating the feasibility of using FBI indicators as building blocks of a Ba$^{+2}$ detector.

Published
2022
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15. The dynamics of ions on phased radio-frequency carpets in high pressure gases and application for barium tagging in xenon gas time projection chambers

Author

Jones, BJP, Raymond, A, Woodruff, K, Byrnes, N, Denisenko, AA, Foss, FW, Navarro, K, Nygren, DR, Vuong, TT, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Bounasser, S, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Díaz, G, Díaz, J, Dickel, T, Escada, J, Esteve, R, Fahs, A, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Ho, J, Ifergan, Y, Kekic, M, Labarga, L, Laing, A, Lebrun, P, Gutierrez, D Lopez, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, Martínez-Vara, M, McDonald, AD, Meziani, ZE, Mistry, K, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, J Muñoz, Novella, P, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Redwine, AB, Renner, J, Ripoll, L, Rivilla, I, García, Y Rodríguez, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sorel, M, Stanford, C, and Teixeira, JMR

Subjects
Nuclear and Plasma Physics, Physical Sciences, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences, Nuclear & Particles Physics, Nuclear and plasma physics
Abstract

Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and kinetic principles are used to calculate ion loss rates in the presence of collisions. This methodology is validated against detailed microscopic SIMION simulations. We then explore a parameter space of special interest for neutrinoless double beta decay experiments: transport of barium ions in xenon at pressures from 1 to 10 bar. Our computations account for molecular ion formation and pressure dependent mobility as well as finite temperature effects. We discuss the challenges associated with achieving suitable operating conditions, which lie beyond the capabilities of existing devices, using presently available or near-future manufacturing techniques.

Published
2022

16. Measurement of the ${}^{136}$Xe two-neutrino double beta decay half-life via direct background subtraction in NEXT

Author

NEXT Collaboration, Novella, P., Sorel, M., Usón, A., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Denisenko, A. A., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero-Gómez, P., Herrero, V., Ho, J., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Larizgoitia, L., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A. D., Meziani, Z. E., Mistry, K., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Navarro, K., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Raymond, A., Redwine, A. B., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Veloso, J. F. C. A., Vuong, T. T., Webb, R., White, J. T., Woodruff, K., and Yahlali, N.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We report a measurement of the half-life of the ${}^{136}$Xe two-neutrino double beta decay performed with a novel direct background subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with ${}^{136}$Xe-enriched and ${}^{136}$Xe-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of $2.34^{+0.80}_{-0.46}\textrm{(stat)}^{+0.30}_{-0.17}\textrm{(sys)}\times10^{21}~\textrm{yr}$ is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double beta decay searches., Comment: 9 pages, 7 figures, and 1 appendix

Published
2021
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17. Measurement of the Xe136 two-neutrino double-β-decay half-life via direct background subtraction in NEXT

Author

Novella, P, Sorel, M, Usón, A, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Bounasser, S, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Denisenko, AA, Díaz, G, Díaz, J, Dickel, T, Escada, J, Esteve, R, Fahs, A, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, FW, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Ho, J, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Larizgoitia, L, Lebrun, P, Gutierrez, D Lopez, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, Martínez-Vara, M, McDonald, AD, Meziani, ZE, Mistry, K, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, J Muñoz, Navarro, K, Nygren, DR, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Raymond, A, Redwine, AB, Renner, J, Ripoll, L, Rivilla, I, García, Y Rodríguez, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Stanford, C, and Teixeira, JMR

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Nuclear and plasma physics
Abstract

We report a measurement of the half-life of the Xe136 two-neutrino double-β decay performed with a novel direct-background-subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with Xe136-enriched and Xe136-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of 2.34-0.46+0.80(stat)-0.17+0.30(sys)×1021yr is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double-β-decay searches.

Published
2022

18. The Dynamics of Ions on Phased Radio-frequency Carpets in High Pressure Gases and Application for Barium Tagging in Xenon Gas Time Projection Chambers

Author

NEXT Collaboration, Jones, B. J. P., Raymond, A., Woodruff, K., Byrnes, N., Denisenko, A. A., Foss, F. W., Navarro, K., Nygren, D. R., Vuong, T. T., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Freixa, Z, Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Hernando~Morata, J. A., Herrero-Gómez, P., Herrero, V., Ho, J., Ifergan, Y., Kekic, M., Labarga, L., Laing, A., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A. D., Meziani, Z. E., Mistry, K., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Novella, P., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A. B., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Webb, R., Weiss-Babai, R., White, J. T., and Yahlali, N.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and kinetic principles are used to calculate ion loss rates in the presence of collisions. This methodology is validated against detailed microscopic SIMION simulations. We then explore a parameter space of special interest for neutrinoless double beta decay experiments: transport of barium ions in xenon at pressures from 1 to 10 bar. Our computations account for molecular ion formation and pressure dependent mobility as well as finite temperature effects. We discuss the challenges associated with achieving suitable operating conditions, which lie beyond the capabilities of existing devices, using presently available or near-future manufacturing techniques., Comment: 26 pages, 16 figures v2: author list update and pre-journal submission adjustments

Published
2021

19. Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution

Author

Simón, A., Ifergan, Y., Redwine, A. B., Weiss-Babai, R., Arazi, L., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Denisenko, A. A., Díaz, G., Díaz, J., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Gosh, S., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ho, J., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Vara, M., Martínez-Lema, G., McDonald, A. D., Meziani, Z. -E., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Newhouse, C., Novella, P., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Webb, R., White, J. T., Woodruff, K., and Yahlali, N.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ~$10^{27}$ yr, requiring suppressing backgrounds to <1 count/tonne/yr. For this, any extra background rejection handle, beyond excellent energy resolution and the use of extremely radiopure materials, is of utmost importance. The NEXT experiment exploits differences in the spatial ionization patterns of double beta decay and single-electron events to discriminate signal from background. While the former display two Bragg peak dense ionization regions at the opposite ends of the track, the latter typically have only one such feature. Thus, comparing the energies at the track extremes provides an additional rejection tool. The unique combination of the topology-based background discrimination and excellent energy resolution (1% FWHM at the Q-value of the decay) is the distinguishing feature of NEXT. Previous studies demonstrated a topological background rejection factor of ~5 when reconstructing electron-positron pairs in the $^{208}$Tl 1.6 MeV double escape peak (with Compton events as background), recorded in the NEXT-White demonstrator at the Laboratorio Subterr\'aneo de Canfranc, with 72% signal efficiency. This was recently improved through the use of a deep convolutional neural network to yield a background rejection factor of ~10 with 65% signal efficiency. Here, we present a new reconstruction method, based on the Richardson-Lucy deconvolution algorithm, which allows reversing the blurring induced by electron diffusion and electroluminescence light production in the NEXT TPC. The new method yields highly refined 3D images of reconstructed events, and, as a result, significantly improves the topological background discrimination. When applied to real-data 1.6 MeV $e^-e^+$ pairs, it leads to a background rejection factor of 27 at 57% signal efficiency., Comment: Submitted to JHEP

Published
2021
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20. Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches

Author

NEXT Collaboration, Adams, C., Álvarez, V., Arazi, L., Arnquist, I. J., Azevedo, C. D. R, Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Denisenko, A. A., Díaz, G., Díaz, J., Escada, J., Esteve, R., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Gosh, S., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Morata, J. A. Hernando, Herrero, P., Herrero, V., Ho, J., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Lebrun, P., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Vara, M., Martínez-Lema, G., McDonald, A. D., Meziani, Z. E., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Vidal, J. Muñoz, Newhouse, C., Novella, P., Nygren, D. R., Oblak, E., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Santos, J. M. F. dos, Simón, A., Sorel, M., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Usón, A., Veloso, J. F. C. A., Vuong, T. T., Webb, R., Weiss-Babai, R., White, J. T., Woodruff, K., and Yahlali, N.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of neutrinoless double-beta decay decay better than 1E27 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond., Comment: 22 pages, 11 figures

Published
2020

21. Sensitivity of a tonne-scale NEXT detector for neutrinoless double-beta decay searches

Author

Adams, C, Álvarez, V, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Denisenko, AA, Díaz, G, Díaz, J, Escada, J, Esteve, R, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, F, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Gosh, S, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Hernando Morata, JA, Herrero, P, Herrero, V, Ho, J, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Vara, M, Martínez-Lema, G, McDonald, AD, Meziani, ZE, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Newhouse, C, Novella, P, Nygren, DR, Oblak, E, Palmeiro, B, Para, A, Pérez, J, Querol, M, Redwine, A, Renner, J, Ripoll, L, Rivilla, I, Rodríguez García, Y, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Sorel, M, Stanford, C, Teixeira, JMR, Thapa, P, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Vuong, TT, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, and Yahlali, N

Subjects
Mathematical Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta (0νββ) decay of 136Xe using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of 0νββ decay better than 1027 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond. [Figure not available: see fulltext.]

Published
2021

22. Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution

Author

Simón, A, Ifergan, Y, Redwine, AB, Weiss-Babai, R, Arazi, L, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Denisenko, AA, Díaz, G, Díaz, J, Escada, J, Esteve, R, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, F, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Gosh, S, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Hernando Morata, JA, Herrero, P, Herrero, V, Ho, J, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Vara, M, Martínez-Lema, G, McDonald, AD, Meziani, Z-E, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Newhouse, C, Novella, P, Nygren, DR, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Renner, J, Ripoll, L, Rivilla, I, Rodríguez García, Y, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Sorel, M, Stanford, C, Teixeira, JMR, Thapa, P, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Vuong, TT, and Webb, R

Subjects
Affordable and Clean Energy, Mathematical Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ∼ 1027 yr, requiring suppressing backgrounds to < 1 count/tonne/yr. For this, any extra background rejection handle, beyond excellent energy resolution and the use of extremely radiopure materials, is of utmost importance. The NEXT experiment exploits differences in the spatial ionization patterns of double beta decay and single-electron events to discriminate signal from background. While the former display two Bragg peak dense ionization regions at the opposite ends of the track, the latter typically have only one such feature. Thus, comparing the energies at the track extremes provides an additional rejection tool. The unique combination of the topology-based background discrimination and excellent energy resolution (1% FWHM at the Q-value of the decay) is the distinguishing feature of NEXT. Previous studies demonstrated a topological background rejection factor of ∼ 5 when reconstructing electron-positron pairs in the 208Tl 1.6 MeV double escape peak (with Compton events as background), recorded in the NEXT-White demonstrator at the Laboratorio Subterráneo de Canfranc, with 72% signal efficiency. This was recently improved through the use of a deep convolutional neural network to yield a background rejection factor of ∼ 10 with 65% signal efficiency. Here, we present a new reconstruction method, based on the Richardson-Lucy deconvolution algorithm, which allows reversing the blurring induced by electron diffusion and electroluminescence light production in the NEXT TPC. The new method yields highly refined 3D images of reconstructed events, and, as a result, significantly improves the topological background discrimination. When applied to real-data 1.6 MeV e−e+ pairs, it leads to a background rejection factor of 27 at 57% signal efficiency. [Figure not available: see fulltext.].

Published
2021

23. The dynamics of ions on phased radio-frequency carpets in high pressure gases and application for barium tagging in xenon gas time projection chambers

Author

Jones, B.J.P., Raymond, A., Woodruff, K., Byrnes, N., Denisenko, A.A., Foss, F.W., Navarro, K., Nygren, D.R., Vuong, T.T., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A.I., Arazi, L., Arnquist, I.J., Ayet, S., Azevedo, C.D.R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J.M., Borges, F.I.G.M., Bounasser, S., Cárcel, S., Carrión, J.V., Cebrián, S., Church, E., Conde, C.A.N., Contreras, T., Cossío, F.P., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L.M.P., Ferrario, P., Ferreira, A.L., Freitas, E.D.C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J.J., González, R., González-Díaz, D., Guenette, R., Gutiérrez, R.M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C.A.O., Morata, J.A. Hernando, Herrero-Gómez, P., Herrero, V., Ho, J., Ifergan, Y., Kekic, M., Labarga, L., Laing, A., Lebrun, P., Gutierrez, D. Lopez, López-March, N., Losada, M., Mano, R.D.P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A.D., Meziani, Z.E., Mistry, K., Monrabal, F., Monteiro, C.M.B., Mora, F.J., Vidal, J. Muñoz, Novella, P., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Redwine, A.B., Renner, J., Ripoll, L., Rivilla, I., García, Y. Rodríguez, Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F.P., dos Santos, J.M.F., Simón, A., Sorel, M., Stanford, C., Teixeira, J.M.R., Thapa, P., Toledo, J.F., Torrent, J., Usón, A., Veloso, J.F.C.A., Webb, R., Weiss-Babai, R., White, J.T., and Yahlali, N.

Published
2022
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25. NEXT-CRAB-0: a high pressure gaseous xenon time projection chamber with a direct VUV camera based readout

Author

Byrnes, N.K., primary, Parmaksiz, I., additional, Adams, C., additional, Asaadi, J., additional, Baeza-Rubio, J., additional, Bailey, K., additional, Church, E., additional, González-Díaz, D., additional, Higley, A., additional, Jones, B.J.P., additional, Mistry, K., additional, Moya, I.A., additional, Nygren, D.R., additional, Oyedele, P., additional, Rogers, L., additional, Stogsdill, K., additional, Almazán, H., additional, Álvarez, V., additional, Aparicio, B., additional, Aranburu, A.I., additional, Arazi, L., additional, Arnquist, I.J., additional, Ayet, S., additional, Azevedo, C.D.R., additional, Ballester, F., additional, del Barrio-Torregrosa, M., additional, Bayo, A., additional, Benlloch-Rodríguez, J.M., additional, Borges, F.I.G.M., additional, Bounasser, S., additional, Cárcel, S., additional, Carrión, J.V., additional, Cebrián, S., additional, Cid, L., additional, Conde, C.A.N., additional, Contreras, T., additional, Cossío, F.P., additional, Dey, E., additional, Díaz, G., additional, Dickel, T., additional, Elorza, M., additional, Escada, J., additional, Esteve, R., additional, Fahs, A., additional, Felkai, R., additional, Fernandes, L.M.P., additional, Ferrario, P., additional, Ferreira, A.L., additional, Foss, F.W., additional, Freitas, E.D.C., additional, Freixa, Z., additional, Generowicz, J., additional, Goldschmidt, A., additional, Gómez-Cadenas, J.J., additional, González, R., additional, Grocott, J., additional, Guenette, R., additional, Haefner, J., additional, Hafidi, K., additional, Hauptman, J., additional, Henriques, C.A.O., additional, Hernando Morata, J.A., additional, Herrero-Gómez, P., additional, Herrero, V., additional, Hervés Carrete, C., additional, Ho, J., additional, Ho, P., additional, Ifergan, Y., additional, Labarga, L., additional, Larizgoitia, L., additional, Lebrun, P., additional, Lopez, F., additional, Lopez Gutierrez, D., additional, López-March, N., additional, Madigan, R., additional, Mano, R.D.P., additional, Marques, A.P., additional, Martín-Albo, J., additional, Martínez-Lema, G., additional, Martínez-Vara, M., additional, Meziani, Z.E., additional, Miller, R.L., additional, Monrabal, F., additional, Monteiro, C.M.B., additional, Mora, F.J., additional, Muñoz Vidal, J., additional, Navarro, K.E., additional, Novella, P., additional, Nuñez, A., additional, Oblak, E., additional, Odriozola-Gimeno, M., additional, Palacio, J., additional, Palmeiro, B., additional, Para, A., additional, Pelegrin, J., additional, Pérez Maneiro, M., additional, Querol, M., additional, Redwine, A.B., additional, Renner, J., additional, Rivilla, I., additional, Rodríguez, J., additional, Rogero, C., additional, Romeo, B., additional, Romo-Luque, C., additional, Santos, F.P., additional, dos Santos, J.M.F., additional, Simón, A., additional, Soleti, S.R., additional, Sorel, M., additional, Stanford, C., additional, Teixeira, J.M.R., additional, Toledo, J.F., additional, Torrent, J., additional, Usón, A., additional, Veloso, J.F.C.A., additional, Vuong, T.T., additional, Waiton, J., additional, and White, J.T., additional

Published
2023
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26. A compact dication source for Ba2+ tagging and heavy metal ion sensor development

Author

Navarro, K.E., primary, Baeza-Rubio, J., additional, Boyd, M., additional, Foss, F.W., additional, Giri, S., additional, Jones, B.J.P., additional, Miller, R.L., additional, Nygren, D.R., additional, Samaniego, F.J., additional, Stogsdill, K., additional, Tiscareno, M.R., additional, Adams, C., additional, Almazán, H., additional, Álvarez, V., additional, Aparicio, B., additional, Aranburu, A.I., additional, Arazi, L., additional, Arnquist, I.J., additional, Ayet, S., additional, Azevedo, C.D.R., additional, Bailey, K., additional, Ballester, F., additional, del Barrio-Torregrosa, M., additional, Bayo, A., additional, Benlloch-Rodríguez, J.M., additional, Borges, F.I.G.M., additional, Bounasser, S., additional, Byrnes, N., additional, Cárcel, S., additional, Carrión, J.V., additional, Cebrián, S., additional, Church, E., additional, Cid, L., additional, Conde, C.A.N., additional, Contreras, T., additional, Cossío, F.P., additional, Dey, E., additional, Díaz, G., additional, Dickel, T., additional, Elorza, M., additional, Escada, J., additional, Esteve, R., additional, Fahs, A., additional, Felkai, R., additional, Fernandes, L.M.P., additional, Ferrario, P., additional, Ferreira, A.L., additional, Freitas, E.D.C., additional, Freixa, Z., additional, Generowicz, J., additional, Goldschmidt, A., additional, Gómez-Cadenas, J.J., additional, González, R., additional, Grocott, J., additional, Guenette, R., additional, Haefner, J., additional, Hafidi, K., additional, Hauptman, J., additional, Henriques, C.A.O., additional, Hernando Morata, J.A., additional, Herrero-Gómez, P., additional, Herrero, V., additional, Hervés Carrete, C., additional, Ho, J., additional, Ho, P., additional, Ifergan, Y., additional, Labarga, L., additional, Larizgoitia, L., additional, Lebrun, P., additional, Lopez, F., additional, Lopez Gutierrez, D., additional, López-March, N., additional, Madigan, R., additional, Mano, R.D.P., additional, Marques, A.P., additional, Martín-Albo, J., additional, Martínez-Lema, G., additional, Martínez-Vara, M., additional, Meziani, Z.E., additional, Mistry, K., additional, Monrabal, F., additional, Monteiro, C.M.B., additional, Mora, F.J., additional, Muñoz Vidal, J., additional, Novella, P., additional, Nuñez, A., additional, Oblak, E., additional, Odriozola-Gimeno, M., additional, Palacio, J., additional, Palmeiro, B., additional, Para, A., additional, Parmaksiz, I., additional, Pelegrin, J., additional, Pérez Maneiro, M., additional, Querol, M., additional, Redwine, A.B., additional, Renner, J., additional, Rivilla, I., additional, Rodríguez, J., additional, Rogero, C., additional, Rogers, L., additional, Romeo, B., additional, Romo-Luque, C., additional, Santos, F.P., additional, dos Santos, J.M.F., additional, Simón, A., additional, Soleti, S.R., additional, Sorel, M., additional, Stanford, C., additional, Teixeira, J.M.R., additional, Toledo, J.F., additional, Torrent, J., additional, Usón, A., additional, Veloso, J.F.C.A., additional, Vuong, T.T., additional, Waiton, J., additional, and White, J.T., additional

Published
2023
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28. This title is unavailable for guests, please login to see more information.

Author

Novella, P, Novella, P, Sorel, M, Usón, A, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Bounasser, S, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Denisenko, AA, Díaz, G, Díaz, J, Dickel, T, Escada, J, Esteve, R, Fahs, A, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, FW, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Ho, J, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Larizgoitia, L, Lebrun, P, Gutierrez, D Lopez, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, Martínez-Vara, M, McDonald, AD, Meziani, ZE, Mistry, K, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, J Muñoz, Navarro, K, Nygren, DR, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Raymond, A, Redwine, AB, Renner, J, Ripoll, L, Rivilla, I, García, Y Rodríguez, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Stanford, C, Teixeira, JMR, Novella, P, Novella, P, Sorel, M, Usón, A, Adams, C, Almazán, H, Álvarez, V, Aparicio, B, Aranburu, AI, Arazi, L, Arnquist, IJ, Ayet, S, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Bounasser, S, Byrnes, N, Cárcel, S, Carrión, JV, Cebrián, S, Church, E, Conde, CAN, Contreras, T, Cossío, FP, Denisenko, AA, Díaz, G, Díaz, J, Dickel, T, Escada, J, Esteve, R, Fahs, A, Felkai, R, Fernandes, LMP, Ferrario, P, Ferreira, AL, Foss, FW, Freitas, EDC, Freixa, Z, Generowicz, J, Goldschmidt, A, Gómez-Cadenas, JJ, González, R, González-Díaz, D, Guenette, R, Gutiérrez, RM, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Morata, JA Hernando, Herrero-Gómez, P, Herrero, V, Ho, J, Ifergan, Y, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Larizgoitia, L, Lebrun, P, Gutierrez, D Lopez, López-March, N, Losada, M, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, Martínez-Vara, M, McDonald, AD, Meziani, ZE, Mistry, K, Monrabal, F, Monteiro, CMB, Mora, FJ, Vidal, J Muñoz, Navarro, K, Nygren, DR, Oblak, E, Odriozola-Gimeno, M, Palmeiro, B, Para, A, Pérez, J, Querol, M, Raymond, A, Redwine, AB, Renner, J, Ripoll, L, Rivilla, I, García, Y Rodríguez, Rodríguez, J, Rogero, C, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, dos Santos, JMF, Simón, A, Stanford, C, and Teixeira, JMR

Published
2022

29. Measurement of the Xe 136 two-neutrino double- ß -decay half-life via direct background subtraction in NEXT

Author

Novella, P., Sorel, M., Usón, A., Adams, C., Almazán, H., Álvarez, V., Aparicio, B., Aranburu, A. I., Arazi, L., Arnquist, I. J., Ayet, S., Azevedo, C. D. R., Bailey, K., Ballester, F., Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Bounasser, S., Byrnes, N., Cárcel, S., Carrión, J. V., Cebrián, S., Church, E., Conde, C. A. N., Contreras, T., Cossío, F. P., Denisenko, A. A., Díaz, G., Díaz, J., Dickel, T., Escada, J., Esteve, R., Fahs, A., Felkai, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Foss, F. W., Freitas, E. D. C., Freixa, Z., Generowicz, J., Goldschmidt, A., Gómez-Cadenas, J. J., González, R., González-Díaz, D., Guenette, R., Gutiérrez, R. M., Haefner, J., Hafidi, K., Hauptman, J., Henriques, C. A. O., Hernando Morata, J. A., Herrero-Gómez, P., Herrero, V., Ho, J., Ifergan, Y., Jones, B. J. P., Kekic, M., Labarga, L., Laing, A., Larizgoitia, L., Lebrun, P., López Gutiérrez, D., López-March, N., Losada, M., Mano, R. D. P., Martín-Albo, J., Martínez, A., Martínez-Lema, G., Martínez-Vara, M., McDonald, A. D., Meziani, Z. E., Mistry, K., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Muñoz Vidal, J., Navarro, K., Nygren, D. R., Oblak, E., Odriozola-Gimeno, M., Palmeiro, B., Para, A., Pérez, J., Querol, M., Raymond, A., Redwine, A. B., Renner, J., Ripoll, L., Rivilla, I., Rodríguez García, Y., Rodríguez, J., Rogero, C., Rogers, L., Romeo, B., Romo-Luque, C., Santos, F. P., Dos Santos, J. M. F., Simón, A., Stanford, C., Teixeira, J. M. R., Thapa, P., Toledo, J. F., Torrent, J., Veloso, J. F. C. A., Vuong, T. T., Webb, R., White, J. T., Woodruff, K., Yahlali, N., and Collaboration, NEXT

Abstract

We report a measurement of the half-life of the Xe136 two-neutrino double-ß decay performed with a novel direct-background-subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with Xe136-enriched and Xe136-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of 2.34-0.46+0.80(stat)-0.17+0.30(sys)×1021yr is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double-ß-decay searches. © 2022 American Physical Society.

Published
2022

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

Author

Herrero-Gómez, P., Calupitan, J. P., Ilyn, M., Berdonces-Layunta, A., Wang, T., de Oteyza, D. G., Corso, M., González-Moreno, R., Rivilla, I., Aparicio, B., Aranburu, A. I., Freixa, Z., Monrabal, F., Cossío, F. P., Gómez-Cadenas, J. J., Rogero, C., NEXT collaboration, Adams, C., Almazán, H., and Álvarez, V.

Subjects
NEUTRINOLESS double beta decay, ION traps, NUCLEAR reactions, FLUORESCENT probes, DETECTORS, ULTRAHIGH vacuum
Abstract

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. One of the possible events signaling a neutrinoless double beta decay is a Xe atom decaying into a Ba ion and two electrons. Aiming at the realisation of a detector for such a process, the authors show that Ba ions can be efficiently trapped (chelated) in vacuum by an organic molecule layer on a surface. [ABSTRACT FROM AUTHOR]

Published
2022
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32. Azobenzene-based ruthenium( ii ) catalysts for light-controlled hydrogen generation

Author

Telleria, A., van Leeuwen, Piet W. N. M., Freixa, Z., University of the Basque Country/Euskal Herriko Unibertsitatea (UPV/EHU), Laboratoire de physique et chimie des nano-objets (LPCNO), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), Basque Foundation for Science (Ikerbasque), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Ikerbasque - Basque Foundation for Science

Subjects
[CHIM.COOR]Chemical Sciences/Coordination chemistry
Abstract

International audience; Eight new ruthenium(II) half-sandwich complexes containing azobenzene-appended pyridine (1), bipyridine (2–5) and phosphine (6 and 7) ligands have been synthesized and fully characterized. UV-vis spectroscopic studies showed that the trans-to-cis photoisomerization was strongly inhibited upon coordination to the metal centre in azopyridine-derived ligands 1 and 2, but it remained efficient in azobenzene-appended bipyridine (3–5) and phosphine (6 and 7) ligands. The complexes were tested as precatalysts for photo-controlled hydrogen generation by hydrolytic decomposition of ammonia-borane (AB). In situ irradiation of the reaction mixtures of compounds [Ru(p-Cym)(6)Cl]Cl and [Ru(p-Cym)(7)Cl]Cl induced a clear change in the catalytic reaction rate, serving as a proof of concept for light-controlled hydrogen generation.

Published
2017

33. Activity of SPANphos Rhodium Dimers in Methanol Carbonylation

Author

Freixa, Z., Kamer, P.C.J., Lutz, M.H., Spek, A.L., van Leeuwen, P.W.N.M., R¿ntgenparticipatieprogramma, Crystal and Structural Chemistry 2, Dep Scheikunde, Homogeneous and Supramolecular Catalysis (HIMS, FNWI), R¿ntgenparticipatieprogramma, Crystal and Structural Chemistry 2, and Dep Scheikunde

Subjects
Molecular Structure, Phosphines, Methanol, chemistry.chemical_element, Homogeneous catalysis, General Chemistry, General Medicine, Ligands, Catalysis, Rhodium, SPANphos, chemistry.chemical_compound, chemistry, International, Organometallic Compounds, Organic chemistry, Molecule, Carbonylation, Dimerization, Group 2 organometallic chemistry
Published
2005
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38. Bite Angle Effects of Diphosphines in Carbonylation Reactions

Author

van Leeuwen, P.W.N.M., Freixa, Z., Kollár, L., and Homogeneous and Supramolecular Catalysis (HIMS, FNWI)

Subjects
chemistry.chemical_classification, chemistry, Alkene, Polyketone, Diphosphines, Organic chemistry, Regioselectivity, Bite angle, Carbonylation, Medicinal chemistry, Monsanto process, Hydroformylation
Abstract

This chapter contains sections titled: * Introduction * Rhodium-Catalyzed Hydroformylation o Introduction o Steric Bite Angle Effect and Regioselectivity o Electronic Bite Angle Effect and Activity o Isotope Effects [24] * Platinum-Catalyzed Alkene Hydroformylation * Palladium-Catalyzed CO/Ethene Copolymerization o Polyketone Formation o Chain Transfer Mechanisms (Initiation-Termination) o Methyl Propanoate Formation o Theoretical Support * Rhodium-Catalyzed Methanol Carbonylation: the Ligand-Modified Monsanto Process * References

Published
2008
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39. Wide-bite-angle diphosphinines: design, synthesis, and coordination properties

Author

Müller, C., Freixa, Z., Lutz, M., Spek, A.L., Vogt, D., van Leeuwen, P.W.N.M., R¿ntgenparticipatieprogramma, and Dep Scheikunde

Abstract

A wide-bite-angle diphosphinine ligand has been designed and synthesized, which exhibits structural features for a preferred formation of trans complexes. Due to the linear orientation of the lone-pair electrons of the phosphorus donors in combination with an appropriate P-P distance, trans coordination toward a Rh center was observed and the corresponding LRh(CO)I complex could be characterized crystallographically. Although typical reactivities usually observed for trans complexes were found, reaction of the diphosphinine with the cis-enforcing precursor [Rh(nbd)2]BF4 did result in the formation of several species at low temperature, to which cis-structures were attributed.

Published
2008

40. Supramolecular catalysis: Refocusing catalysis

Author

van Leeuwen, P.W.N.M., Freixa, Z., and Homogeneous and Supramolecular Catalysis (HIMS, FNWI)

Subjects
chemistry.chemical_compound, Denticity, chemistry, Supramolecular chemistry, Personal history, Ionic bonding, Organic chemistry, macromolecular substances, Combinatorial chemistry, Phosphine, Supramolecular catalysis, humanities, Catalysis
Abstract

This chapter contains sections titled:* Introduction: A Brief Personal History* Secondary Phosphines or Phosphites as Supramolecular Ligands* Host-Guest Catalysis* Ionic Interactions as a Means to Form Heterobidentate Assembly Ligands* Ditopic Ligands for the Construction of Bidentate Phosphine Ligands* Conclusions and Outlook

Published
2008

41. Properties of phosphorus ligands

Author

van Leeuwen, P.W.N.M., Freixa, Z., Zuidema, E., Börner, A., and Homogeneous and Supramolecular Catalysis (HIMS, FNWI)

Published
2008

49. Activity of SPANphos Rhodium Dimers in Methanol Carbonylation.

Author

R¿ntgenparticipatieprogramma, Crystal and Structural Chemistry 2, Dep Scheikunde, Freixa, Z., Kamer, P.C.J., Lutz, M.H., Spek, A.L., van Leeuwen, P.W.N.M., R¿ntgenparticipatieprogramma, Crystal and Structural Chemistry 2, Dep Scheikunde, Freixa, Z., Kamer, P.C.J., Lutz, M.H., Spek, A.L., and van Leeuwen, P.W.N.M.

Published
2005

50. Alcoholysis of acylpalladium(II) complexes relevant to the alternating copolymerization of ethene and carbon monoxide and the alkoxycarbonylation of alkenes: the importance of cic-coordinating phosphines.

Author

R¿ntgenparticipatieprogramma, Crystal and Structural Chemistry 2, Dep Scheikunde, van Leeuwen, P.W.N.M., Zuideveld, M.A., Swennenhuis, B.H.G., Freixa, Z., Kamer, P.C.J., Goubitz, K., Fraanje, J., Lutz, M.H., Spek, A.L., R¿ntgenparticipatieprogramma, Crystal and Structural Chemistry 2, Dep Scheikunde, van Leeuwen, P.W.N.M., Zuideveld, M.A., Swennenhuis, B.H.G., Freixa, Z., Kamer, P.C.J., Goubitz, K., Fraanje, J., Lutz, M.H., and Spek, A.L.

Published
2003

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