Results 91 to 100 of about 24,208 (239)
Introduction to nuclear astrophysics
, 2009 In the first lecture of this volume, we will present the basic fundamental ideas regarding nuclear processes occurring in stars. We start from stellar observations, will then elaborate on some important quantum-mechanical phenomena governing nuclear ...
Iliadis, Christian
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Code dependencies of pre-supernova evolution and nucleosynthesis in massive stars: Evolution to the end of core helium burning [PDF]
, 2014 Massive stars are key sources of radiative, kinetic and chemical feedback in the Universe. Grids of massive star models computed by different groups each using their own codes, input physics choices and numerical approximations, however, lead to ...
Fryer, C. +7 more
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Nuclear astrophysicists at war
Natural Sciences, Volume 4, Issue 1, January 2024.The Manhattan program not only opened the path to the nuclear age for humans, but also triggered a lot of new questions and research directions in nuclear physics and astrophysics that still inform the ideas in these fields today. Abstract The question of energy production in stars stimulated an entire generation of young physicists in the 1930s who ...
Michael Wiescher, Karlheinz Langanke
wiley +1 more source
The Revival of Galactic Cosmic Ray Nucleosynthesis? [PDF]
, 1998 Because of the roughly linear correlation between Be/H and Fe/H in low metallicity halo stars, it has been argued that a ``primary'' component in the nucleosynthesis of Be must be present in addition to the ``secondary'' component from standard Galactic ...
Alonso A. +17 more
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A mechanism to account for well known peculiarities of low mass AGB star nucleosynthesis
EPJ Web of Conferences, 2017 We present here the application of a model for a mass circulation mechanism induced by the stellar magnetic field to study peculiar aspects of AGB star nucleosynthesis. The mixing scheme is based on a previously suggested magnetic-buoyancy process [1, 2]
Palmerini Sara +3 more
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Improved BBN constraints on the variation of the gravitational constant
European Physical Journal C: Particles and Fields, 2020 Big Bang Nucleosynthesis (BBN) is very sensitive to the cosmological expansion rate. If the gravitational constant G took a different value during the nucleosynthesis epoch than today, the primordial abundances of light elements would be affected.
James Alvey +3 more
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Evolution of Massive Population III Stars
Acta Polytechnica CTU Proceedings, 2014 While the evolution of massive stars in the local Universe is dominated by mass-loss, the evolution of massive Population III stars should be dominated by rotation.
Sung-Chul Yoon
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Stellar Mixing and s-PROCESS Nucleosynthesis
The Astrophysical Journal, 1977 A model for the operation of the s-process is studied in which neutron capture occurs only in a thin layer at the bottom of a deep convective envelope. Simultaneous convective mixing and neutron capture are described by means of diffusion equations. We find that this model admits abundance distributions which resemble the solar system distribution, but
Richard L. Smith, Anthony Gonsiorowski
openaire +1 more source
Nuclear astrophysics at Gran Sasso Laboratory: the LUNA experiment
EPJ Web of Conferences, 2018 LUNA is an experimental approach for the study of nuclear fusion reactions based on an underground accelerator laboratory. Aim of the experiment is the direct measurement of the cross section of nuclear reactions relevant for stellar and primordial ...
Cavanna Francesca
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Re-examining Neutron Capture and Stellar Weak Rates of 97Mo under Astrophysical Conditions
Cumhuriyet Science JournalThis paper presents a re-analysis of neutron capture and stellar weak interaction rates of 97Mo under astrophysical conditions. The Maxwellian-averaged cross sections (MACS), neutron capture rates, and β^- decay/positron capture rates are investigated ...
Jameel-un Nabi +2 more
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