Search

Your search keyword '"Redon, N."' showing total 5 results
Start Over Author "Redon, N." Search Limiters Full Text Publication Year Range Last 3 years
5 results on '"Redon, N."'

1. High-resolution spectroscopy of neutron-rich Br isotopes and signatures for a prolate-to-oblate shape transition at N=56

Author

Dudouet, J., Colombi, G., Tello, D. Reygadas, Michelagnoli, C., Dao, D. D., Nowacki, F., Abushawish, M., Clément, E., Costache, C., Duchêne, G., Kandzia, F., Lemasson, A., Marginean, N., Marginean, R., Mihai, C., Pascu, S., Rejmund, M., Rezynkina, K., Stezowski, O., Turturica, A., Ujeniuc, S., Astier, A., de Angelis, G., de France, G., Delafosse, C., Deloncle, I., Gadea, A., Gottardo, A., Jones, P., Konstantinopoulos, T., Kuti, I., Blanc, F. Le, Lenzi, S. M., Lozeva, R., Million, B., Pérez-Vidal, R. M., Petrache, C. M., Ralet, D., Redon, N., Schmitt, C., Sohler, D., and Verney, D.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The first systematic experimental study of the neutron-rich Br isotopes with two complementary state-of-the-art techniques is presented. These isotopes have been populated in the fission process at two different facilities, GANIL and ILL. New spectroscopic information has been obtained for odd-even $^{87-93}$Br isotopes and the experimental results have been compared with state-of-the-art Large-Scale Shell-Model and DNO Shell-Model calculations. As a result of such theoretical approaches, a transition from prolate ($^{87,89}$Br) to oblate ($^{91,93}$Br) shapes is obtained from the subtle balance between proton and neutron quadrupole deformations, as a clear signature of pseudo-SU3 quadrupole regime., Comment: 17 pages, 24 figures, 5 tables

Published
2024

2. Search for $^{22}$Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Author

Fougères, C., Santos, F. de Oliveira, José, J., Michelagnoli, C., Clément, E., Kim, Y. H., Lemasson, A., Guimaraes, V., Barrientos, D., Bemmerer, D., Benzoni, G., Boston, A. J., Bottger, R., Boulay, F., Bracco, A., Celikovic, I., Cederwall, B., Ciemala, M., Delafosse, C., Domingo-Pardo, C., Dudouet, J., Eberth, J., Fulop, Z., Gonzalez, V., Goupil, J., Hess, H., Jungclaus, A., Kaskas, A., Korichi, A., Lenzi, S. M., Leoni, S., Li, H., Ljungvall, J., Lopez-Martens, A., Menegazzo, R., Mengoni, D., Million, B., Mrazek, J., Napoli, D. R., Navin, A., Nyberg, J., Podolyak, Zs., Pullia, A., Quintana, B., Ralet, D., Redon, N., Reiter, P., Rezynkina, K., Saillant, F., Salsac, M. D., Sanchez-Benitez, A. M., Sanchis, E., Senyigit, M., Siciliano, M., Smirnova, N. A., Sohler, D., Stanoiu, M., Theisen, Ch., Valiente-Dobon, J. J., Ujic, P., and Zielinska, M.

Subjects
Nuclear Experiment, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

Classical novae are thermonuclear explosions in stellar binary systems, and important sources of $^{26}$Al and $^{22}$Na. While gamma rays from the decay of the former radioisotope have been observed throughout the Galaxy, $^{22}$Na remains untraceable. The half-life of $^{22}$Na (2.6 yr) would allow the observation of its 1.275 MeV gamma-ray line from a cosmic source. However, the prediction of such an observation requires good knowledge of the nuclear reactions involved in the production and destruction of this nucleus. The $^{22}$Na($p,\gamma$)$^{23}$Mg reaction remains the only source of large uncertainty about the amount of $^{22}$Na ejected. Its rate is dominated by a single resonance on the short-lived state at 7785.0(7) keV in $^{23}$Mg. In the present work, a combined analysis of particle-particle correlations and velocity-difference profiles is proposed to measure femtosecond nuclear lifetimes. The application of this novel method to the study of the $^{23}$Mg states, combining magnetic and highly-segmented tracking gamma-ray spectrometers, places strong limits on the amount of $^{22}$Na produced in novae, explains its non-observation to date in gamma rays (flux < 2.5x$10^{-4}$ ph/(cm$^2$s)), and constrains its detectability with future space-borne observatories., Comment: 18 pages, 3 figures, 1 table

Published
2022
Full Text
View/download PDF

3. Molecular diagnosis of non-autoinmune subclinical hypothyroidism in paediatrics

Author

Gonzalez-Llorens, N, Mate, MA, Leon, MC, Martorell, AC, Vinals, EM, Colomer, LS, Tomasini, R, Gonzalez-Morla, J, Valles, MM, Riera, CA, Sancho, PC, Munoz, JB, Morell, ME, Gomez, SO, Hernandez-Herrero, M, Rovira, AF, Camats-Tarruella, N, Baz-Redon, N, Fernandez-Cancio, M, and Fernandez, DY

Published
2022

4. Search for 22 Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes.

Author

Fougères C, de Oliveira Santos F, José J, Michelagnoli C, Clément E, Kim YH, Lemasson A, Guimarães V, Barrientos D, Bemmerer D, Benzoni G, Boston AJ, Böttger R, Boulay F, Bracco A, Čeliković I, Cederwall B, Ciemala M, Delafosse C, Domingo-Pardo C, Dudouet J, Eberth J, Fülöp Z, González V, Gottardo A, Goupil J, Hess H, Jungclaus A, Kaşkaş A, Korichi A, Lenzi SM, Leoni S, Li H, Ljungvall J, Lopez-Martens A, Menegazzo R, Mengoni D, Million B, Mrázek J, Napoli DR, Navin A, Nyberg J, Podolyák Z, Pullia A, Quintana B, Ralet D, Redon N, Reiter P, Rezynkina K, Saillant F, Salsac MD, Sánchez-Benítez AM, Sanchis E, Şenyiğit M, Siciliano M, Smirnova NA, Sohler D, Stanoiu M, Theisen C, Valiente-Dobón JJ, Ujić P, and Zielińska M

Abstract

Classical novae are thermonuclear explosions in stellar binary systems, and important sources of 26 Al and 22 Na. While γ rays from the decay of the former radioisotope have been observed throughout the Galaxy, 22 Na remains untraceable. Its half-life (2.6 yr) would allow the observation of its 1.275 MeV γ-ray line from a cosmic source. However, the prediction of such an observation requires good knowledge of its nucleosynthesis. The 22 Na(p, γ) 23 Mg reaction remains the only source of large uncertainty about the amount of 22 Na ejected. Its rate is dominated by a single resonance on the short-lived state at 7785.0(7) keV in 23 Mg. Here, we propose a combined analysis of particle-particle correlations and velocity-difference profiles to measure femtosecond nuclear lifetimes. The application of this method to the study of the 23 Mg states, places strong limits on the amount of 22 Na produced in novae and constrains its detectability with future space-borne observatories., (© 2023. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)

Published
2023
Full Text
View/download PDF

5. Conductive Polymer Composites for Hydrogen Sulphide Sensors Working at Sub-PPM Level and Room Temperature.

Author

Duc C, Boukhenane ML, Fagniez T, Khouchaf L, Redon N, and Wojkiewicz JL

Abstract

Hybrid composites based on tin chloride and the conductive polymers, polyaniline (PAni) and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), were integrated into high-performance hydrogen sulphide (H2S) gas sensors working at room temperature. The morphology and chemical properties were studied by scanning and transmission electron microscopy (SEM, TEM), energy dispersive spectroscopy (EDS) and Fourier-transform infrared (FTIR). The composites demonstrated a slightly porous nanostructure and strong interactions between the polymers and the metal salt, which slightly dopes PAni. The hybrid sensors exhibited a very low detection limit (<85 ppb), fast response, repeatability, reproducibility and stability over one month. Moreover, this work presents how calibration based on the derivative of the signal can give hybrid sensors the ability to quantify the concentration of targeted gas, even during continuous variation of the analyte concentration. Finally, the effect of interfering species, such as water and ammonia, is discussed.

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results