Results 21 to 30 of about 12,181 (205)
Universe, 2022 The foundations of stellar nucleosynthesis have been established more than 70 years ago. Since then, much progress has been made, both on the theoretical side, with stellar evolution and nucleosynthesis models of increasing complexity, using more and ...
Sophie Van Eck +2 more
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Ar+ ArH+ Reactive Collisions of Astrophysical Interest: The Case of 36Ar
ChemPhysChem, Volume 24, Issue 20, October 17, 2023., 2023 A complete theoretical investigation of the 36Ar+36ArH+ reactive collision involving the most abundant Argon isotope in the interstellar medium. Abstract The reactive collision between 36Ar and the 36ArH+ species has been investigated by means of quantum mechanical (QM), quasiclassical trajectories (QCT) and statistical quantum mechanical (SQM ...
María Judit Montes de Oca‐Estévez +5 more
wiley +1 more source
Universe, 2021 The slow neutron-capture process (s-process) efficiency in low-mass AGB stars (1.5 < M/M⊙ < 3) critically depends on how mixing processes in stellar interiors are handled, which is still affected by considerable uncertainties.
Umberto Battino +4 more
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Primordial Nucleosynthesis [PDF]
Journal of Physics: Conference Series, 2013 Invited Plenary Talk given at the 11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas, USA, May 27-June 1, 2012. To appear in the NN2012 Proceedings in Journal of Physics: Conference Series (JPCS)
openaire +22 more sources
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
Positron Transport and Annihilation in the Galactic Bulge
Galaxies, 2018 The annihilation of positrons in the Milky Way Galaxy has been observed for ∼50 years; however, the production sites of these positrons remains hard to identify.
Fiona Helen Panther
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Geophysical Research Letters, Volume 50, Issue 4, 28 February 2023., 2023 Abstract We employed MC‐ICP‐MS to measure the mass‐dependent Ca isotope compositions of Vesta‐related meteorites. Eucrites and diogenites show distinct Ca isotope compositions, which is caused by crystallization of isotopically heavy orthopyroxene. The Ca isotope data support a model where the two lithologies are linked, where the diogenites, mainly ...
Ke Zhu +5 more
wiley +1 more source
Nucleosynthesis and Kilonovae from Strange Star Mergers
Universe, 2019 In this talk, we summarize the work in progress toward a full characterization of strange star−strange star (SS−SS) mergers related to the GW/GRB/kilonova events.
J. E. Horvath +5 more
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Origin of 182W Anomalies in Ocean Island Basalts
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 2, February 2023., 2023 Abstract Ocean island basalts (OIB) show variable 182W deficits that have been attributed to either early differentiation of the mantle or core‐mantle interaction. However, 182W variations may also reflect nucleosynthetic isotope heterogeneity inherited from Earth's building material, which would be evident from correlated 182W and 183W anomalies. Some
Gregory J. Archer +5 more
wiley +1 more source
Núcleos exóticos e síntese dos elementos químicos
Química Nova, 2012 We have around ninety chemical elements available in nature, which were produced mainly by nuclear reactions inside stars. The fusion reactions are the main synthesis process which generates the light and intermediate masses elements.
Nilton Teruya, Sérgio Barbosa Duarte
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