Heavy Puzzle Pieces: Learning About the i Process from Pb Abundances

Melanie Hampel, Amanda I. Karakas, R. J. Stancliffe, Maria Lugaro, B. S. Meyer

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch


We examine the observed heavy-element abundances of two types of objects that show enrichments in s-process elements but whose abundance patterns are generally incompatible with s-process predictions: CEMP-i stars and Pb-poor post-AGB stars, with representative metallicities around and respectively. We can explain these abundance patterns, including the puzzlingly low Pb abundances of post-AGB stars, as results of i-process nucleosynthesis. To do this we use nuclear-network calculations to study heavy-element production at different constant neutron densities up to. The constraints posed by measured Pb abundances in these objects, allow us to characterise the neutron densities and exposures of the process responsible for creating the observed heavy-element abundances.

Original languageEnglish
Title of host publicationNuclei in the Cosmos XV
EditorsLucio Gialanella, Gianluca Imbriani, Alba Formicola, Matthias Junker
Place of PublicationCham Switzerland
Number of pages4
ISBN (Electronic)9783030138769
ISBN (Print)9783030138752
Publication statusPublished - 20 Aug 2019
EventInternational Symposium on Nuclei in the Cosmos 2018 - Laboratori Nazionali del Gran Sasso, L'Aquila, Italy
Duration: 24 Jun 201829 Jun 2018
Conference number: 15th

Publication series

NameSpringer Proceedings in Physics
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941


ConferenceInternational Symposium on Nuclei in the Cosmos 2018
Abbreviated titleNIC 2018
OtherThe conference aims to address the current major achievements in nuclear physics, astrophysics, astronomy, cosmo-chemistry and neutrino physics that provide the necessary framework for any microscopic understanding of astrophysical processes, as well as for discussing the future directions and perspectives in the various fields of Nuclear Astrophysics research.

Thus the NIC XV program will consist of invited review talks and selected oral and poster contributions on important experimental and theoretical results in nuclear, particle and astrophysics researches, as well as a detailed and thorough exposition of the modern challenges in nuclear astrophysical scenarios.
In addition a limited number of talks of more general interest about Double Beta Decay, Dark Matter, will be included in the conference program to provide an overview of different aspects of underground physics.
Internet address

Cite this