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Effects of the s-process on Fe-group elements in meteorites

Trippella, O. and Busso, M. and Wasserburg, G. J. and Palmerini, S. and Frondini, F. and Petrelli, M. and Zucchini, A. (2016) Effects of the s-process on Fe-group elements in meteorites. Journal of Physics: Conference Series, 703 . Art. No. 012027. ISSN 1742-6588. doi:10.1088/1742-6596/703/1/012027.

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In the present paper we investigate the possible connection between s-process nucleosynthesis occurring during the asymptotic giant branch (AGB) phase of low-mass stars (LMS) and the isotopic anomalies of the "Fe-group" elements observed in several macroscopic samples of meteorites or in grains formed as circumstellar condensates (hereafter CIRCONs). The available measurements of chromium, iron, and nickel are well reproduced by stellar models, which account for the largest shifts in the heaviest isotopes of each element: in particular ^(54)Cr, ^(58)Fe, and ^(64)Ni. Moreover, many circumstellar condensates reflect ^(50)Ti excesses and some production of ^(46, 47, 49)Ti, as predicted by slow-neutron captures in AGB stars. Nevertheless, some difficulties are found in comparing theoretical calculations of s-process nucleosynthesis with calcium, silicon, and zinc isotopic anomalies.

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Wasserburg, G. J.0000-0002-7957-8029
Additional Information:© 2017 Published under licence by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. This research was supported by the Department of Physics and Geology of the University of Perugia (through the grant named "From Rocks to Stars") and the INFN, Section of Perugia through the funds of its Group III.
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University of PerugiaUNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Record Number:CaltechAUTHORS:20170105-083356029
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Official Citation:O Trippella et al 2016 J. Phys.: Conf. Ser. 703 012027
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73254
Deposited By: Tony Diaz
Deposited On:05 Jan 2017 17:41
Last Modified:11 Nov 2021 05:13

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