Results 31 to 40 of about 173,669 (191)

Low Mass Stars or Intermediate Mass Stars? The Stellar Origin of Presolar Oxide Grains Revealed by Their Isotopic Composition

Frontiers in Astronomy and Space Sciences, 2021
Among presolar grains, oxide ones are made of oxygen, aluminum, and a small fraction of magnesium, produced by the 26Al decay. The largest part of presolar oxide grains belong to the so-called group 1 and 2, which have been suggested to form in Red Giant
S. Palmerini, S. Palmerini, S. Cristallo, S. Cristallo, M. Busso, M. Busso, M. La Cognata, M. L. Sergi, M. L. Sergi, D. Vescovi, D. Vescovi, D. Vescovi   +11 more
doaj   +1 more source

A Proposal for a Low‐Frequency Axion Search in the 1–2 μ$\umu$ eV Range and Below with the BabyIAXO Magnet

Annalen der Physik, Volume 535, Issue 12, December 2023., 2023
This article describes the implementation of low‐frequency axion haloscope setups inside the future BabyIAXO magnet. The RADES proposal has a potential sensitivity to the axion‐photon coupling down to values corresponding to the KSVZ model, in the mass range between 1 and 2 μ$\umu$eV.
Saiyd Ahyoune, Alejandro Álvarez Melcón, Sergio Arguedas Cuendis, Sergio Calatroni, Cristian Cogollos, Jack Devlin, Alejandro Díaz‐Morcillo, David Díez‐Ibáñez, Babette Döbrich, Javier Galindo, Juan Daniel Gallego, Jose María García‐Barceló, Benito Gimeno, Jessica Golm, Yikun Gu, Louis Herwig, Igor Garcia Irastorza, Antonio Jose Lozano‐Guerrero, Chloé Malbrunot, Jordi Miralda‐Escudé, Juan Monzó‐Cabrera, Pablo Navarro, Jose Ramón Navarro‐Madrid, Javier Redondo, José Reina‐Valero, Kristof Schmieden, Tim Schneemann, Marc Siodlaczek, Stefan Ulmer, Walter Wuensch   +29 more
wiley   +1 more source

Nuclear reactions involving light elements & BBN [PDF]

EPJ Web of Conferences
Light elements play a key role in different scenario in astrophysics, ranging from primordial nucleosynthesis up to stellar nucleosynthesis and cosmic ray nucleosynthesis.
Lamia L.
doaj   +1 more source

Kinetics of the tautomerization of thioimidic acids R−C(SH)NH → R−C(S)NH2: For R = H, F, HO, CN, NC, H2N, HC(O), HC(S), HC≡ C, CH3, CF3, H2C=CH, HOCH2, H2NCH2,CH3C(O), C2H5, (CH3)2CH, C6H5

International Journal of Chemical Kinetics, Volume 55, Issue 11, Page 731-742, November 2023., 2023
Abstract The kinetics of the tautomerization of thio‐imidic acids RC(SH)NH were determined at low (50–300 K) and high (500–1500 K) temperatures as R was varied to encompass mono‐ and diatomic species H, F, HO, NC, CN through H2N, HC(O), HC(S), HC≡ C, H3C, F3C, HOCH2, H2C=CH, CH3C(O), H2NCH2 and including ethyl, isopropyl and phenyl groups. The presence
Judith Würmel, John M. Simmie
wiley   +1 more source

Ab Initio Thermodynamics Calculation of Beta Decay Rates

Annalen der Physik, Volume 535, Issue 10, October 2023., 2023
Beta‐decay half‐lives are calculated ab initio from thermodynamics, independently of any quantum mechanics. The calculated values are close to those experimentally observed. Abstract Beta‐decay half‐lives for the free neutron, for 6He and 8He, and for 8Li are calculated ab initio from geometrical thermodynamics arguments, independently of any quantum ...
Michael C. Parker, Christopher Jeynes
wiley   +1 more source

The Nuclear Astrophysics program at n_TOF (CERN)

EPJ Web of Conferences, 2017
An important experimental program on Nuclear Astrophysics is being carried out at the n_TOF since several years, in order to address the still open issues in stellar and primordial nucleosynthesis.
Colonna N., Aberle O., Andrzejewski J., Audouin L., Bacak M., Balibrea J., Barbagallo M., Bečvář F., Berthoumieux E., Billowes J., Bosnar D., Brown A., Caamaño M., Calviño F., Calviani M., Cano-Ott D., Cardella R., Casanovas A., Cerutti F., Chen Y. H., Chiaveri E., Clai G., Cortés G., Cortés-Giraldo M. A., Cosentino, Cristallo S., Damone L. A., Diakaki M., Domingo-Pardo C., Dressler L. R., Dupont E., Durán I., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Göbel K., García A. R., Gawlik A., Gilardoni S., Glodariu T., Gonçalves I. F., González E., Griesmayer E., Guerrero C., Gunsing F., Harada H., Heinitz S., Hernandez-Prieto A., Heyse J., Jenkins D. G., Jericha E., Käppeler F., Kadi Y., Kalamara A., Kavrigin P., Kimura A., Kivel N., Kokkoris M., Kroll J., Krtička M., Kurtulgil D., Langer C., Leal-Cidoncha E., Lederer C., Lerendegui-Marco J., Leeb H., Lo Meo S., Lonsdale S. J., Losito S., Macina D., Mallik A., Marganiec J., Martínez T., Masi A., Massimi C., Mastinu P., Mastromarco M., Maugeri E. A., Mazzone A., Mendoza E., Mengoni A., Mingrone F., Milazzo P. M., Mirea M., Musumarra A., Negret A., Nolte R., Oprea A., Patronis N., Pavlik A., Perkowski J., Piersanti L., Porras I., Praena J., Quesada J. M., Radeck D., Rauscher T., Reifarth R., Riego A., Robles M.S., Rubbia C., Ryan J. A., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Schumann D., Sedyshev P., Smith A. G., Sosnin N. V., Stamatopoulos A., Tagliente G., Tain J. L., Tarifeño-Saldivia A., Tassan-Got L., Tsinganis A., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Warren S., Weiss C., Woods P. J., Wright T., Žugec P.   +129 more
doaj   +1 more source

Mixing and Magnetic Fields in Asymptotic Giant Branch Stars in the Framework of FRUITY Models

Universe, 2021
In the last few years, the modeling of asymptotic giant branch (AGB) stars has been much investigated, both focusing on nucleosynthesis and stellar evolution aspects. Recent advances in the input physics required for stellar computations made it possible
Diego Vescovi
doaj   +1 more source

Neutron capture cross section of unstable 63Ni: implications for stellar nucleosynthesis. [PDF]

Physical Review Letters, 2013
The 63Ni(n,γ) cross section has been measured for the first time at the neutron time-of-flight facility n_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian averaged cross
C. Lederer, C. Massimi, S. Altstadt, J. Andrzejewski, L. Audouin, M. Barbagallo, V. Bécares, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, V. Boccone, D. Bosnar, M. Brugger, M. Calviani, F. Calvino, D. Cano-Ott, C. Carrapiço, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Cortes, M. Cortés-Giraldo, M. Diakaki, C. Domingo-Pardo, I. Durán, R. Dressler, N. Dzysiuk, C. Eleftheriadis, A. Ferrari, K. Fraval, S. Ganesan, A. García, G. Giubrone, M. B. Gómez-Hornillos, I. Goncalves, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, P. Gurusamy, D. Jenkins, E. Jericha, Y. Kadi, F. Käppeler, D. Karadimos, N. Kivel, P. Koehler, M. Kokkoris, G. Korschinek, M. Krticka, J. Kroll, C. Langer, H. Leeb, L. S. Leong, R. Losito, A. Manousos, J. Marganiec, T. Martinez, P. Mastinu, M. Mastromarco, M. Meaze, E. Mendoza, A. Mengoni, P. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, C. Paradela, A. Pavlik, J. Perkowski, M. Pignatari, A. Plompen, J. Praena, J. Quesada, T. Rauscher, R. Reifarth, A. Riego, F. Roman, C. Rubbia, R. Sarmento, P. Schillebeeckx, S. Schmidt, D. Schumann, G. Tagliente, J. Tain, D. Tarrío, L. Tassan-got, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiss, T. Wright, P. Žugec   +104 more
semanticscholar   +1 more source

Structure effects of 20N in elemental abundance estimations during explosive nucleosynthesis [PDF]

EPJ Web of Conferences
Most nuclei far from the valley of stability, and typically near the drip lines, exhibit exotic features that have challenged our current understanding of nuclear structure.
Barman Jinti, Chatterjee Rajdeep
doaj   +1 more source

θ-dependence of light nuclei and nucleosynthesis

Physical Review Research, 2020
We investigate the impact of the QCD vacuum at nonzero θ on the properties of light nuclei, Big Bang nucleosynthesis, and stellar nucleosynthesis. Our analysis starts with a calculation of the θ-dependence of the neutron-proton mass difference and ...
Dean Lee, Ulf-G. Meißner, Keith A. Olive, Mikhail Shifman, Thomas Vonk   +4 more
doaj   +1 more source