Results 31 to 40 of about 48,373 (195)

Massive Star Modeling and Nucleosynthesis

open access: yesFrontiers in Astronomy and Space Sciences, 2021
After a brief introduction to stellar modeling, the main lines of massive star evolution are reviewed, with a focus on the nuclear reactions from which the star gets the needed energy to counterbalance its gravity.
Sylvia Ekström
doaj   +1 more source

Proton-rich nucleosynthesis and nuclear physics [PDF]

open access: yes, 2012
Although the detailed conditions for explosive nucleosynthesis are derived from astrophysical modeling, nuclear physics determines fundamental patterns in abundance yields, not only for equilibrium processes. Focussing on the nu p- and the gamma-process,
Froehlich, C., Rauscher, T.
core   +2 more sources

Nuclear reactions involving light elements & BBN [PDF]

open access: yesEPJ Web of Conferences
Light elements play a key role in different scenario in astrophysics, ranging from primordial nucleosynthesis up to stellar nucleosynthesis and cosmic ray nucleosynthesis.
Lamia L.
doaj   +1 more source

Neutron-Driven Nucleosynthesis in Stellar Plasma

open access: yesFrontiers in Physics, 2022
A large uncertainty for the slow neutron capture nucleosynthesis (s-process) models is caused by the amount of neutrons available to the process itself.
R. Spartà   +24 more
doaj   +1 more source

Leptonic Photons and Nucleosynthesis [PDF]

open access: yes, 1996
Should $U(1)$ long-range forces be associated to electron, muon and/or tau quantum number then their ''fine structure constants" are seen to be bound by nucleosynthesis data to be less than about $1.7 \times 10^{-11}$.
Grifols, J. A., Masso, E.
core   +2 more sources

Design study of a HPGe detector array for β-decay investigation in laboratory ECR plasmas

open access: yesFrontiers in Physics, 2022
In the frame of the PANDORA project, a new experimental approach aims at measuring in-plasma β-decay rate as a function of thermodynamical conditions of the environment, namely a laboratory magnetized plasma able to mimic some stellar-like conditions ...
Eugenia Naselli   +12 more
doaj   +1 more source

Isomers in the Cosmos

open access: yesAtoms, 2023
The nucleosynthesis of chemical elements has been established to be the result of a variety of different types of nuclear reactions in stars. Under the extreme temperatures and densities encountered in such environments, nuclear isomers can be populated ...
Eric B. Norman
doaj   +1 more source

Neutrino Nucleosynthesis of radioactive nuclei in supernovae [PDF]

open access: yes, 2015
We study the neutrino-induced production of nuclides in explosive supernova nucleosynthesis for progenitor stars with solar metallicity and initial main sequence masses between 15 M$_\odot$ and 40 M$_\odot$. We improve previous investigations i) by using
Heger, A.   +4 more
core   +2 more sources

Nucleosynthesis Without Computer [PDF]

open access: yesInternational Journal of Theoretical Physics, 2004
I derive completely analytically the time evolution and final abundances of the light elements (up to Be-7) formed in the big-bang nucleosynthesis.This highlights an interesting physics taking place during the formation of light elements in the early universe.
openaire   +2 more sources

Mixing Uncertainties in Low-Metallicity AGB Stars: The Impact on Stellar Structure and Nucleosynthesis

open access: yesUniverse, 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
doaj   +1 more source

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