Results 121 to 130 of about 13,955 (228)
Coupled baryon diffusion and nucleosynthesis in the early universe [PDF]
, 1990 We report on calculations of primordial nucleosynthesis in baryon-number inhomogeneous big bang models. Nucleosynthesis yields are presented as a function of Ωb for a range of parameters which characterize the amplitude, shape, and mean separation of ...
Meyer, BS +7 more
core +1 more source
The Ba Isotopic Ratio as a Way of Distinguishing the R- and S-Process in Chemical Evolution Models
GalaxiesOnly recently, observational studies have started providing measurements for the barium isotopic ratio in metal-poor stars with unprecedented detail. This new approach can be extremely useful in tracing back the origin of neutron-capture elements, since ...
Federico Rizzuti +4 more
doaj +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
doaj +1 more source
New Results on Nucleosynthesis in Massive Stars; Nuclear Data Needs for Nucleosynthesis
, 2001 We review the current status of the nuclear reaction rates needed to study nucleosynthesis in massive stars. Results for the calculated nucleosynthesis of all stable species from Hydrogen to Bismuth in a completely evolved 25 M{sub {circle_dot}} star of ...
Rauscher, T +3 more
core
Positron accumulations from stellar nucleosynthesis
Frontiers in Astronomy and Space SciencesThe predominant fusion chain in stellar nucleosynthesis produces positron and neutrino byproducts in equal amounts. An extremely high neutrino flux can be directly measured, but the unobservable, yet equally high flux of positrons is traditionally ...
Joseph Caleb Philipps +4 more
doaj +1 more source
Nucleosynthesis in a baryon-inhomogeneous universe with coupled baryon diffusion [PDF]
, 1990 Detailed calculations of big-bang nucleosynthesis in baryon-inhomogeneous universes show that {Omega}{sub b} can be considerably larger than its limit from standard big-bang nucleosynthesis.
Meyer, B.S.
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86th Annual Meeting of the Meteoritical Society (2024)
Meteoritics &Planetary Science, Volume 59, Issue S1, Page i-xlii, August 2024.
wiley +2 more sources
Exploring Nucleosynthesis Models through Inertial Confinement Fusion
openUnderstanding the origin and evolution of the elements remains one of the key challenges in astro- physics. While traditional nucleosynthesis studies rely on accelerator-based experiments conducted in underground laboratories, these setups are ...
PAVAN, LIDIA GIUDITTA
core
87th Annual Meeting of the Meteoritical Society 2025: Contents
Meteoritics &Planetary Science, Volume 60, Issue S1, Page 2-29, August 2025.
wiley +1 more source
Nucleosynthesis and Nucleo-Cosmochronology
, 2004 I discuss a few selected topics on nucleosynthesis and nucleo-cosmochronology in faint, if not totally illusory, hopes of helping to gain a clear perspective of the future astronuclear physics.
K. Takahashi
core +1 more source