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Article Dans Une Revue Nature Communications Année : 2023

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

1 ANL - Argonne National Laboratory [Lemont]
2 GANIL - Grand Accélérateur National d'Ions Lourds
3 UPC - Universitat Politècnica de Catalunya [Barcelona]
4 ILL - Institut Laue-Langevin
5 IBS - Institute for Basic Science [Daejeon]
6 IFUSP - Instituto de Fisica da Universidade de São Paulo
7 CERN [Genève]
8 HZDR - Helmholtz-Zentrum Dresden-Rossendorf
9 INFN - Istituto Nazionale di Fisica Nucleare, Sezione di Milano
10 University of Liverpool
11 VINCA - Vinca Institute of Nuclear Sciences, University of Belgrade
12 Department of Physics, Royal Institute of Technology (KTH)
13 UNIMI - Università degli Studi di Milano = University of Milan
14 IJCLab - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
15 Universidad de Valencia
16 IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
17 Institut für Kernphysik der Universität zu Köln
18 ATOMKI - Institute for Nuclear Research [Budapest]
19 UV - Universitat de València
20 Instituto de Estructura de la Materia, CSIC, E-28006 Madrid
21 INFN, Sezione di Padova - Istituto Nazionale di Fisica Nucleare, Sezione di Padova
22 Unipd - Università degli Studi di Padova = University of Padua
23 Dipartimento di Fisica, Università degli studi di Milano
24 Nuclear Physics Institute of the Czech Academy of Sciences
25 INFN, Laboratori Nazionali di Legnaro
26 Department of Physics and Astronomy, Uppsala University
27 Department of Physics, University of Surrey
28 Universidad de Salamanca
29 IPHC - Institut Pluridisciplinaire Hubert Curien
30 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
31 CEAFMC, University of Huelva
32 LP2I - Bordeaux - Laboratoire de Physique des Deux Infinis Bordeaux
33 Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, IFIN-HH Bucharest
Chloé Fougères
Diego Barrientos
  • Fonction : Auteur
Daniel Bemmerer
Zsolt Fülöp
Vicente González
Andrea Gottardo
Ayşe Kaşkaş
Begoña Quintana
Menekşe Şenyiğit
Jose Valiente-Dobón
  • Fonction : Auteur

Résumé

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 through-out the Galaxy, $^{22}$Na remains untraceable. The half-life of $^{22}$Na (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 the nuclear reactions involved in the production and destruction of this nucleus. 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 reso- nance 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 γ -ray spectrometers, places strong limits on the amount of $^{22}$Na produced in novae, explains its non-observation to date in γ rays (flux < 2.5×10$^{-4}$ ph.cm$^{-2}$ s$^{-1}$), and constrains its detectability with future space-borne observatories.
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hal-03912454 , version 1 (24-12-2022)

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Chloé Fougères, François de Oliveira Santos, Jordi José, Caterina Michelagnoli, Emmanuel Clément, et al.. Search for $^{22}$Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes. Nature Communications, 2023, 14 (1), pp.4536. ⟨https://doi.org/10.1038/s41467-023-40121-3⟩. ⟨hal-03912454⟩
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