出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In massive stars the s
process (slow neutron capture process) is activated at different temperatures,
during He
burning and during convective shell C
burning. At solar metallicity, the neutron
capture process in the convective C
shell adds a substantial contribution to the s
process
yields made by the previous core He
burning, and the final results carry the signature of both
processes. With decreasing metallicity, the contribution of the C
burning shell to the weak
s
process rapidly decreases, because of the effect of the primary neutron poisons. On the other
hand, also the s
process efficiency in the He core decreases with metallicity.
