Results 1 to 10 of about 12,181 (205)
Duration of Nucleosynthesis [PDF]
Physical Review Letters, 1960 In a recent Letter on a determination of the age of the elements, Reynolds[1] reported the important discovery of isotopically anomalous xenon in the stony meteorite Richarton. The isotopes which appear to occur in significant excess over atmospheric xenon are Xe128, Xe129, Xe130, and Xe131, with the Xe129 dominant by an order of magnitude.
G. J. Wasserburg +2 more
openalex +5 more sources
Primordial nucleosynthesis [PDF]
International Journal of Modern Physics E, 2017 Primordial nucleosynthesis, or big bang nucleosynthesis (BBN), is one of the three evidences for the big bang model, together with the expansion of the universe and the cosmic microwave background. There is a good global agreement over a range of nine orders of magnitude between abundances of 4He, D, 3He and 7Li deduced from observations, and ...
Coc, Alain, Vangioni, Elisabeth
arxiv +6 more sources
Nucleosynthesis in Supernovae [PDF]
Physical Review Letters, 1999 5 pages, deleted "high brow stuff" on charge conjugation for referee, Phys. Rev. Lett.
C. J. Horowitz, Gang Li
+7 more sources
Chaotic Amplification of Neutrino Chemical Potentials by Neutrino Oscillations in Big Bang Nucleosynthesis [PDF]
Phys.Rev. D54 (1996) 2753-2760, 1996 We investigate in detail the parameter space of active-sterile neutrino oscillations that amplifies neutrino chemical potentials at the epoch of Big Bang Nucleosynthesis. We calculate the magnitude of the amplification and show evidences of chaos in the amplification process.
Xiangdong Shi
arxiv +3 more sources
Post-AGB Stars as Tracers of AGB Nucleosynthesis: An Update
Universe, 2022 The chemical evolution of galaxies is governed by the chemical yields from stars, and here we focus on the important contributions from asymptotic giant branch (AGB) stars. AGB nucleosynthesis is, however, still riddled with complexities.
Devika Kamath, Hans Van Winckel
doaj +1 more source
Solar data uncertainty impacts on MCMC methods for r-process nucleosynthesis
Frontiers in Physics, 2022 In recent work, we developed a Markov Chain Monte Carlo (MCMC) procedure to predict the ground state masses capable of forming the observed Solar r-process rare-earth abundance peak.
Nicole Vassh +4 more
doaj +1 more source
Eighteen Years of Kilonova Discoveries with Swift
Universe, 2023 Swift has now completed 18 years of mission, during which it discovered thousands of gamma-ray bursts as well as new classes of high-energy transient phenomena.
Eleonora Troja
doaj +1 more source
Universe, 2022 Presolar grains are microscopic dust grains that formed in the stellar winds or explosions of ancient stars that died before the formation of the solar system.
Nan Liu, Sergio Cristallo, Diego Vescovi
doaj +1 more source
Neutrino nucleosynthesis [PDF]
Physics Letters B, 2005 We study neutrino process nucleosynthesis in massive stars using newly calculated cross sections, an expanded reaction network, and complete and self-consistent models of the progenitor star. We reevaluate the production of light isotopes from abundant progenitors as well as that of rare, heavy, proton-rich isotopes.
Heger, A. +5 more
openaire +4 more sources
The building blocks of the universe
HTS Teologiese Studies/Theological Studies, 2021 I review the state of knowledge of the composition of the universe for a non-specialist audience. The universe is built up of four components. These are radiation, baryonic (ordinary) matter, dark matter and dark energy.
Anslyn J. John
doaj +1 more source