Results 21 to 30 of about 307 (107)
Radioactive nuclei from cosmochronology to habitability
Progress in Particle and Nuclear Physics, 2018 Review published in Progress in Particle and Nuclear Physics. The article is being published Open Access, access to the full article is not restricted in any way.
Lugaro, Maria +2 more
openaire +4 more sources
The Nuclear Astrophysics Program at the CERN n_TOF Facility: Results and Perspectives
UniverseThe CERN n_TOF facility is a research infrastructure specifically designed for studying neutron-induced nuclear reactions. Pulsed white neutron beams are delivered toward three experimental areas, two of them at different baselines to apply the time-of ...
P. M. Milazzo +2 more
doaj +1 more source
Thresholds on star formation and the chemical evolution of galactic discs: cosmochronology and the age of the Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1996 Latex version 3.1, 12 pages + 15 figures, MNRAS in press, replaces earlier version in which the postscript figures had become ...
Chamcham, K., Hendry, M. A.
openaire +2 more sources
In situ single‐spot Rb/Sr cosmochronology of roedderite in the Ribbeck aubrite (asteroid 2024 BX1)
Meteoritics &Planetary Science, Volume 61, Issue 5, Page 768-781, May 2026.Abstract The mineralogy and textures of several fragments from the Ribbeck aubrite were analyzed using a combination of scanning electron microscopy, electron microprobe analysis, μRaman spectroscopy, and laser ablation inductively coupled reaction cell mass spectrometry (LA‐ICP‐MS/MS).
Christopher J. Barnes +6 more
wiley +1 more source
White dwarf cosmochronology: Techniques and uncertainties [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractWhite dwarfs represent the endpoint of the evolution of the large majority of stars formed in the Galaxy. In the last two decades observations and theory have improved to a level that makes possible to employ white dwarfs for determining ages of the stellar populations in the solar neighborhood, and in the nearest star clusters.
openaire +1 more source
Galactic Chemical Evolution and Nucleocosmochronology: Standard Model with Terminated Infall [PDF]
, 1984 Some exactly soluble families of models for the chemical evolution of the Galaxy are presented. The parameters considered include gas mass, the age-metallicity relation, the star mass vs. metallicity, the age distribution, and the mean age of dwarfs.
Clayton, Donald D
core +1 more source
The Presolar Heritage of 50Ti and 26Al Heterogeneity in the Protoplanetary Disk
The Astrophysical JournalNucleosynthetic isotope anomalies have been documented within the solar protoplanetary disk for several isotopes, including ^48 Ca, ^50 Ti, ^54 Cr, ^94 Mo, and ^96 Zr.
Kirsten K. Larsen +5 more
doaj +1 more source
The Astrophysical Journal, 1979 Recent data on isotopic anomalies of various elements in meteorites are interpreted in the picture of the birth of the Sun in a stellar OB association. The following points are suggested by this analysis. (a) The standard picture of stellar nucleosynthesis by an exponentially decreasing stellar activity throughout the galactic life remains tenable. (b)
openaire +1 more source
238U/235U systematics in terrestrial uranium-bearing minerals [PDF]
, 2012 The present-day 238U/235U ratio has fundamental implications for uranium-lead geochronology and cosmochronology. A value of 137.88 has previously been considered invariant and has been used without uncertainty to calculate terrestrial mineral ages.
McLean, Noah +3 more
core +1 more source
White Dwarfs: Cosmological and Galactic Probes [PDF]
, 2005 The emphasis on white dwarf stars and cosmology arises from the most recent advances in cosmological and galactic structure research in which white dwarf stars are playing a very prominent role. Examples are Type Ia supernovae (i.e.
Shipman, Harry L +2 more
core +1 more source