Results 41 to 50 of about 12,181 (205)
Primordial nucleosynthesis [PDF]
Proceedings of the National Academy of Sciences, 1998 With the advent of the new extragalactic deuterium observations, Big Bang nucleosynthesis (BBN) is on the verge of undergoing a transformation. In the past, the emphasis has been on demonstrating the concordance of the BBN model with the abundances of the light isotopes extrapolated back to their primordial values by using stellar and
openaire +2 more sources
Nucleosynthesis in Early Neutrino Driven Winds [PDF]
AIP Conf.Proc.1005:225-228,2008, 2008 Nucleosynthesis in early neutrino winds is investigated. Presented is a brief overview of two recent problems of supernova nucleosynthesis. In the first part we investigate the effect of nuclear parameters on the synthesis of Mo92 and Mo94. Based on recent experimental results, we find that the proton rich winds of the model investigated here can not ...
arxiv +1 more source
Nucleosynthesis Predictions and High-Precision Deuterium Measurements
Universe, 2017 Two new high-precision measurements of the deuterium abundance from absorbers along the line of sight to the quasar PKS1937–1009 were presented. The absorbers have lower neutral hydrogen column densities (N(HI) ≈ 18 cm − 2 ) than for previous ...
Signe Riemer-Sørensen +1 more
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Prospect for measurements of (γ, n) reaction cross-sections of p-nuclei at ELI-NP
Frontiers in Astronomy and Space Sciences, 2023 The gamma beam system under construction at the ELI-NP facility in Romania is projected to give the nuclear physics community access to an experimental system providing a high-intensity, narrow bandwidth photon beam at variable energy.
P.-A. Söderström +3 more
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Inhomogeneous Big-Bang Nucleosynthesis in Light of Recent Observations [PDF]
Phys.Rev. D59 (1999) 083505, 1998 We consider inhomogeneous big bang nucleosynthesis in light of the present observational situation. Different observations of He-4 and D disagree with each other, and depending on which set of observations one uses, the estimated primordial He-4 corresponds to a lower baryon density in standard big bang nucleosynthesis than what one gets from deuterium.
arxiv +1 more source
Nucleosynthesis and Mixing in Cassiopeia A [PDF]
The Astrophysical Journal, 2000 13 pages, including 3 postscript figs, LaTeX.
John P. Hughes +3 more
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Structure formation cosmic rays: Identifying observational constraints [PDF]
Serbian Astronomical Journal, 2005 Shocks that arise from baryonic in-fall and merger events during the structure formation are believed to be a source of cosmic rays. These "structure formation cosmic rays" (SFCRs) would essentially be primordial in composition, namely, mostly made of ...
Prodanović T., Fields B.D.
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Following Fission Products in Explosive Astrophysical Environments [PDF]
EPJ Web of Conferences, 2020 The astrophysical process by which the heaviest elements are formed in the universe is known as the rapid neutron capture process, or r process, of nucleosynthesis.
Sprouse T. M., Mumpower M. R., Surman R.
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Pygmy resonances and nucleosynthesis [PDF]
EPJ Web of Conferences, 2015 A microscopic theoretical approach based on a self-consistent density functional theory for the nuclear ground state and QRPA formalism extended with multi-phonon degrees of freedom for the nuclear excited states is implemented in investigations of new low-energy modes called pygmy resonances.
Horst Lenske, N. Tsoneva
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The NuGrid AGB Evolution and Nucleosynthesis Data Set
Universe, 2022 Asymptotic Giant Branch (AGB) stars play a key role in the chemical evolution of galaxies. These stars are the fundamental stellar site for the production of light elements such as C, N and F, and half of the elements heavier than Fe via the slow neutron
Umberto Battino +4 more
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