7 papers · 1 filter
Short-lived nuclei in the Galaxy and in the early solar system: crucial tests expected from gamma-ray line observations
Maurizio Busso, Stefano Ciprini, Francesca Marcucci
We discuss some open problems in the understanding of the Early Solar System abundances of short-lived radioactive isotopes, and the important clarification expected on this matter…
s- and r-process elements in two very metal-poor stars
Sean G. Ryan, Wako Aoki, Lisa A. J. Blake +5
New measurements of neutron-capture elements are presented for two very metal-poor stars ([Fe/H] ~ -3). One (LP 625-44) has an s-process signature believed to be due to mass transf…
Thermally Pulsing AGB Models of Intermediate Mass Stars
O. Straniero, M. Limongi, A. Chieffi +3
We present a set of models of AGB stars with initial mass larger than 5 Mo as obtained with the FRANEC code. It includes models of Z=0.02 and Z=0.001, with and without mass loss.
s-process nucleosynthesis of 142^Nd: crisis of the classical model
C. Arlandini, F. Kaeppeler, K. Wisshak +4
The recently improved information on the stellar neutron capture cross sections of neutron magic nuclei at N = 82, and in particular for 142^Nd, turned out to represent a sensitive…
A New Astrophysical Interpretation of the Si and Ti Isotopic Compositions of Mainstream SiC Grains from Primitive Meteorites
Maria Lugaro, Roberto Gallino, Maurizio Busso +2
Mainstream presolar SiC grains from primitive meteorites show a clear s-process signature in the isotopic composition of heavy trace elements. These grains most likely condensed in…
Galactic chemical evolution of Ba-peak elements
C. Travaglio, D. Galli, R. Gallino +3
The chemical evolution of the Galaxy is followed for the elements affected by neutron capture, in particular for those in the atomic number range 56 to 63 (Ba, La, Ce, Pr, Nd, Sm a…