Production of 26Al, 44Ti and 60Fe in Supernovae-sensitivity to the helium burning rates

Clarisse Tur, Alexander Heger, Sam M Austin

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We have studied the sensitivity of supernova production of the gamma emitting nuclei 26Al, 44Ti and 60Fe to variations of the rates, R and Rα12, of the triple alpha and 12C(α, γ) reactions. Over a range of twice their experimental uncertainties we find variations in the production of 60Fe by more than a factor of five. Smaller variations, about a factor of two to three, were observed for 26Al and 44Ti. The yields of these isotopes change significantly when the abundances of Lodders (2003) are used instead of those of Anders and Grevesse (1989). These sensitivities will limit conclusions based on a comparison of observed gamma ray intensities and stellar models until the helium burning rates are better known. Prospects for improving the helium burning rates are discussed and a new version of the Boyes rate for 12C(α, γ) is presented.

Original languageEnglish
Title of host publicationProceedings of Science
Subtitle of host publication11th Symposium on Nuclei in the Cosmos
PublisherSissa Medialab, SRL
Number of pages5
Publication statusPublished - 2010
Externally publishedYes
EventSymposium on Nuclei in the Cosmos, NIC 2010 - Heidelberg, Germany
Duration: 19 Jul 201023 Jul 2010
Conference number: 11th

Publication series

NameProceedings of Science
PublisherSissa Medialab, SRL
ISSN (Print)1824-8039


ConferenceSymposium on Nuclei in the Cosmos, NIC 2010
Abbreviated titleNIC 2010
Internet address

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