Results 51 to 60 of about 767 (211)
Geostandards and Geoanalytical Research, Volume 48, Issue 4, Page 863-885, December 2024.Key Points A method is described to obtain high precision Sn isotope ratios using the double spike technique in geological reference materials containing 0.03 to 7 μg g−1 of Sn. δ122/118Sn values are reported for sixteen geological RMs. Improved precision was achieved compared with previous studies by using low concentration Sn analyte.
Dipankar Pathak, Klaus Mezger
wiley +1 more source
The Observer’s Guide to the Gamma‐Ray Burst Supernova Connection
Advances in Astronomy, Volume 2017, Issue 1, 2017., 2017 We present a detailed report of the connection between long‐duration gamma‐ray bursts (GRBs) and their accompanying supernovae (SNe). The discussion presented here places emphasis on how observations, and the modelling of observations, have constrained what we know about GRB‐SNe.
Zach Cano +4 more
wiley +1 more source
The Role of Neutrinos in Explosive Nucleosynthesis [PDF]
Proceedings of International Symposium on Nuclear Astrophysics - Nuclei in the Cosmos - IX — PoS(NIC-IX), 2010 We present a new primary nucleosynthesis process, the # p-process, occurring in supernovae (and possibly gamma-ray bursts) when strong neutrino fluxes create proton-rich ejecta. In this process, antineutrino absorptions in the proton-rich environment produce neutrons that are immediately captured by neutron-deficient nuclei.
Fröhlich, C. +7 more
openaire +2 more sources
Explosive Nucleosynthesis: What We Learned and What We Still Do Not Understand
, 2019 This review touches on historical aspects, going back to the early days of nuclear astrophysics, initiated by B2FH and Cameron, discusses (i) the required nuclear input from reaction rates and decay properties up to the nuclear equation of state ...
Friedrich-Karl Thielemann +1 more
core +1 more source
Stellar Evolution, SN Explosion, and Nucleosynthesis
, 2022 42 pages, 17 figures; Invited chapter for Handbook of X-ray and Gamma-ray Astrophysics (Eds. C. Bambi and A. Santangelo, Springer Singapore, expected in 2022).
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The bulk mineralogy, elemental composition, and water content of the Winchcombe CM chondrite fall
Meteoritics &Planetary Science, Volume 59, Issue 5, Page 1006-1028, May 2024.Abstract On the microscale, the Winchcombe CM carbonaceous chondrite contains a number of lithological units with a variety of degrees of aqueous alteration. However, an understanding of the average hydration state is useful when comparing to other meteorites and remote observations of airless bodies.
H. C. Bates +8 more
wiley +1 more source
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
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Explosive Nucleosynthesis in Helium Zones
The Astrophysical Journal, 1971 We study by numerical integration the network of nuclear reactions that are expected to occur when the helium zones of a star are instantaneously heated and allowed to expand adiabatically. The dependence of the results on nuclear cross-sections, on the peak temperature, and on the time scale of the hydrodynamic expansion are discussed.
Howard, W M +2 more
openaire +2 more sources
56Ni Production in Long-lived Binary Neutron Star Merger Remnants
The Astrophysical Journal LettersWe investigate the nucleosynthesis and kilonova emission based on numerical-relativity binary neutron star merger simulations that incorporate a two-moment neutrino-transport scheme.
Maximilian Jacobi +7 more
doaj +1 more source
Core-collapse Supernova Simulations with Reduced Nucleosynthesis Networks
The Astrophysical Journal, 2023 We present core-collapse supernova simulations including nuclear reaction networks that impact explosion dynamics and nucleosynthesis. The different composition treatment can lead to changes in the neutrino heating in the vicinity of the shock by ...
Gerard Navó +3 more
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