Short-lived Nuclei in the Early Solar System: Possible AGB Sources

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dc.creatorWasserburg, G. J.
dc.creatorBusso, M.
dc.creatorGallino, R.
dc.creatorNollett, K. M.
dc.date2006-02-24
dc.date.accessioned2026-07-07T07:00:52Z
dc.date.available2026-07-07T07:00:52Z
dc.description(Abridged) We review abundances of short-lived nuclides in the early solar system (ESS) and the methods used to determine them. We compare them to the inventory for a uniform galactic production model. Within a factor of two, observed abundances of several isotopes are compatible with this model. I-129 is an exception, with an ESS inventory much lower than expected. The isotopes Pd-107, Fe-60, Ca-41, Cl-36, Al-26, and Be-10 require late addition to the solar nebula. Be-10 is the product of particle irradiation of the solar system as probably is Cl-36. Late injection by a supernova (SN) cannot be responsible for most short-lived nuclei without excessively producing Mn-53; it can be the source of Mn-53 and maybe Fe-60. If a late SN is responsible for these two nuclei, it still cannot make Pd-107 and other isotopes. We emphasize an AGB star as a source of nuclei, including Fe-60 and explore this possibility with new stellar models. A dilution factor of about 4e-3 gives reasonable amounts of many nuclei. We discuss the role of irradiation for Al-26, Cl-36 and Ca-41. Conflict between scenarios is emphasized as well as the absence of a global interpretation for the existing data. Abundances of actinides indicate a quiescent interval of about 1e8 years for actinide group production in order to explain the data on Pu-244 and new bounds on Cm-247. This interval is not compatible with Hf-182 data, so a separate type of r-process is needed for at least the actinides, distinct from the two types previously identified. The apparent coincidence of the I-129 and trans-actinide time scales suggests that the last actinide contribution was from an r-process that produced actinides without fission recycling so that the yields at Ba and below were governed by fission.
dc.description92 pages, 14 figure files, in press at Nuclear Physics A
dc.identifierhttps://arxiv.org/abs/astro-ph/0602551
dc.identifierhttp://arxiv.org/abs/astro-ph/0602551
dc.identifierNucl.Phys. A777 (2006) 5-69
dc.identifierdoi:10.1016/j.nuclphysa.2005.07.015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108107
dc.subjectAstrophysics
dc.titleShort-lived Nuclei in the Early Solar System: Possible AGB Sources
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