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Le Pennec M, Turck-Chièze S, Salmon S, Blancard C, Cossé P, Faussurier G, Mondet G. FIRST NEW SOLAR MODELS WITH OPAS OPACITY TABLES. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/2041-8205/813/2/l42] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Gilles D, Turck-Chièze S, Busquet M, Thais F, Loisel G, Piau L, Ducret J, Blenski T, Blancard C, Cossé P, Faussurier G, Gilleron F, Pain J, Porcherot Q, Guzik J, Kilcrease D, Magee N, Harris J, Bastiani-Ceccotti S, Delahaye F, Zeippen C. Iron and Nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135914003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Poirier M, Arnault P, Bastiani-Ceccotti S, Blenski T, Dortan FDGD, Gilleron F, Loisel G, Pain JC, Porcherot Q, Reverdin C, Silvert V, Thais F, Turck-Chièze S. Theoretical interpretation for 2 p− ndabsorption spectra of iron, nickel, and copper in X-ray range measured at the LULI2000 facility. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135914001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Blenski T, Loisel G, Poirier M, Thais F, Arnault P, Caillaud T, Fariaut J, Gilleron F, Pain JC, Porcherot Q, Reverdin C, Silvert V, Villette B, Bastiani-Ceccotti S, Turck-Chièze S, Foelsner W, de Gaufridy de Dortan F. Opacity of iron, nickel, and copper plasmas in the x-ray wavelength range: theoretical interpretation of 2p-3d absorption spectra. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 84:036407. [PMID: 22060513 DOI: 10.1103/physreve.84.036407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 06/30/2011] [Indexed: 05/31/2023]
Abstract
This paper deals with theoretical studies on the 2p-3d absorption in iron, nickel, and copper plasmas related to LULI2000 (Laboratoire pour l'Utilisation des Lasers Intenses, 2000J facility) measurements in which target temperatures were of the order of 20 eV and plasma densities were in the range 0.004-0.01 g/cm(3). The radiatively heated targets were close to local thermodynamic equilibrium (LTE). The structure of 2p-3d transitions has been studied with the help of the statistical superconfiguration opacity code SCO and with the fine-structure atomic physics codes HULLAC and FAC. A new mixed version of the sco code allowing one to treat part of the configurations by detailed calculation based on the Cowan's code RCG has been also used in these comparisons. Special attention was paid to comparisons between theory and experiment concerning the term features which cannot be reproduced by SCO. The differences in the spin-orbit splitting and the statistical (thermal) broadening of the 2p-3d transitions have been investigated as a function of the atomic number Z. It appears that at the conditions of the experiment the role of the term and configuration broadening was different in the three analyzed elements, this broadening being sensitive to the atomic number. Some effects of the temperature gradients and possible non-LTE effects have been studied with the help of the radiative-collisional code SCRIC. The sensitivity of the 2p-3d structures with respect to temperature and density in medium-Z plasmas may be helpful for diagnostics of LTE plasmas especially in future experiments on the Δn=0 absorption in medium-Z plasmas for astrophysical applications.
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Affiliation(s)
- T Blenski
- CEA, IRAMIS, Service Photons, Atomes et Molécules, Centre d'Études de Saclay, F-91191 Gif-sur-Yvette Cedex, France.
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Abstract
Neutrinos are fundamental particles ubiquitous in the Universe and whose properties remain elusive despite more than 50 years of intense research activity. This review illustrates the importance of solar neutrinos in astrophysics, nuclear physics and particle physics. After a description of the historical context, we remind the reader of the noticeable properties of these particles and of the stakes of the solar neutrino puzzle. The standard solar model triggered persistent efforts in fundamental physics to predict the solar neutrino fluxes, and its constantly evolving predictions have been regularly compared with the detected neutrino signals. Anticipating that this standard model could not reproduce the internal solar dynamics, a seismic solar model was developed which enriched theoretical neutrino flux predictions within situobservation of acoustic and gravity waves propagating in the Sun. This seismic model contributed to the stabilization of the neutrino flux predictions. This review recalls the main historical steps, from the pioneering Homestake mine experiment and the GALLEX-SAGE experiments capturing the first proton-proton neutrinos. It emphasizes the importance of the SuperKamiokande and SNO detectors. Both experiments demonstrated that the solar-emitted electron neutrinos are partially transformed into other neutrino flavors before reaching the Earth. This sustained experimental effort opens the door to neutrino astronomy, with long-base lines and underground detectors. The success of BOREXINO in detecting the7Be neutrino signal alone instills confidence in physicists' ability to detect each neutrino source separately. It justifies the building of a new generation of detectors to measure the entire solar neutrino spectrum in greater detail, as well as supernova neutrinos. A coherent picture has emerged from neutrino physics and helioseismology. Today, new paradigms take shape in these two fields: neutrinos are massive particles, but their masses are still unknown, and the research on the solar interior focuses on the dynamical aspects and on the signature of dark matter. The magnetic moment of the neutrino begins to be an actor in stellar evolution. The third part of the review is dedicated to this prospect. The understanding of the crucial role of both rotation and magnetism in solar physics benefits from SoHO, SDO and PICARD space observations, and from a new prototype, GOLF-NG. The magnetohydrodynamical view of the solar interior is a new way of understanding the impact of the Sun on the Earth's environment and climate. For now, the particle and stellar challenges seem decoupled, but this is only a superficial appearance. The development of asteroseismology-with the COROT and KEPLER spacecraft-and of neutrino physics will both contribute to improvements in our understanding of, for instance, supernova explosions. This shows the far-reaching impact of neutrino and stellar astronomy.
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Turck-Chièze S, Loisel G, Gilles D, Thais F, Bastiani S, Blancard C, Busquet M, Caillaud T, Cosse P, Blenski T, Delahaye F, EDucret J, Faussurier G, Gilleron F, Guzik J, Harris JW, Kilcrease DP, Magee NH, Piau L, Pain JC, Poirier M, Porcherot Q, Reverdin C, Silvert V, Villette B, Zeippen C. Theoretical and experimental activities on opacities for a good interpretation of seismic stellar probes. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/271/1/012035] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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García RA, Turck-Chièze S, Jiménez-Reyes SJ, Ballot J, Pallé PL, Eff-Darwich A, Mathur S, Provost J. Tracking Solar Gravity Modes: The Dynamics of the Solar Core. Science 2007; 316:1591-3. [PMID: 17478682 DOI: 10.1126/science.1140598] [Citation(s) in RCA: 210] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Solar gravity modes have been actively sought because they directly probe the solar core (below 0.2 solar radius), but they have not been conclusively detected in the Sun because of their small surface amplitudes. Using data from the Global Oscillation at Low Frequency instrument, we detected a periodic structure in agreement with the period separation predicted by the theory for gravity dipole modes. When studied in relation to simulations including the best physics of the Sun determined through the acoustic modes, such a structure favors a faster rotation rate in the core than in the rest of the radiative zone.
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Affiliation(s)
- Rafael A García
- DSM/DAPNIA/Service d'Astrophysique, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France.
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Turck-Chièze S, Couvidat S, Piau L, Ferguson J, Lambert P, Ballot J, García RA, Nghiem P. Surprising sun: a new step towards a complete picture? Phys Rev Lett 2004; 93:211102. [PMID: 15600989 DOI: 10.1103/physrevlett.93.211102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2004] [Indexed: 05/24/2023]
Abstract
Important revisions of the solar model ingredients have appeared recently. We first show that the updated CNO composition suppresses the anomalous position of the Sun in the known galactic enrichment. The following law, He/H = 0.075 + 44.6 O/H in number fraction, is now compatible with all the indicators. We then suggest some directions of investigation to solve the discrepancies between the standard model and solar seismic observations. We finally update our predicted neutrino fluxes using a seismic model and all the recent progress. We get 5.31 +/- 0.6 x 10(6)/cm2/s for the total 8B neutrinos, 66.5 +/- 4.4 SNU and 2.76 +/- 0.4 SNU for the gallium and chlorine detectors, all in remarkable agreement with the detected values including neutrino oscillations for the last two. So, the acoustic modes and detected neutrinos see the same Sun, but the standard model fails to reproduce them.
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Chenais-Popovics C, Fajardo M, Gilleron F, Teubner U, Gauthier JC, Bauche-Arnoult C, Bachelier A, Bauche J, Blenski T, Thais F, Perrot F, Benuzzi A, Turck-Chièze S, Chièze JP, Dorchies F, Andiel U, Foelsner W, Eidmann K. L-band x-ray absorption of radiatively heated nickel. Phys Rev E Stat Nonlin Soft Matter Phys 2002; 65:016413. [PMID: 11800796 DOI: 10.1103/physreve.65.016413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2001] [Accepted: 01/18/2001] [Indexed: 05/23/2023]
Abstract
Absorption of L-M and L-N transitions of nickel has been measured using point projection spectroscopy. The x-ray radiation from laser-irradiated gold cavities was used to heat volumetrically nickel foils "tamped with carbon" up to 20 eV. Experimental spectra have been analyzed with calculations based on the spin-orbit split arrays statistical approach and performed for each ionic species Ni5+ to Ni11+. Using a least-squares fit, this method provides an ion distribution broader than at local thermodynamic equilibrium, which is explained by spatial and temporal temperature gradients. A major improvement in the simulation of the absolute value of transmission is obtained with a resolved transition array statistical calculation that reproduces the experimental spectrum with the nominal areal mass density by taking into account the saturation of narrow lines.
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Affiliation(s)
- C Chenais-Popovics
- Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605 CNRS, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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Traini M, Turck-Chièze S, Zghiche A. Deep inelastic electron scattering in the distorted-wave Born approximation: An analytic approach. Phys Rev C Nucl Phys 1988; 38:2799-2812. [PMID: 9955123 DOI: 10.1103/physrevc.38.2799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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