Nucleosynthesis in massive stars using extended adaptive nuclear reaction networks

Heger, A. and Rauscher, T. and Hoffman, R. D. and Woosley, S. E.. (2001) Nucleosynthesis in massive stars using extended adaptive nuclear reaction networks. In: Tours symposium on nuclear physics IV (AIP conference proceedings, Vol. 561). Melville, pp. 44-47.

Full text not available from this repository.

Official URL: http://edoc.unibas.ch/dok/A5839304

Downloads: Statistics Overview


We present the first calculations to follow the evolution of all stable isotopes and their abundant radioactive progenitors in a finely zoned stellar model from the onset of central hydrogen burning through explosion as a Type II supernova. An extended adaptive nuclear reaction network is implemented that contains about 700 isotopes during hydrogen and helium burning and more than 2500 isotopes during the supernova explosion. The calculations were performed for 15, 20, and 25 M-circle dot Pop I stars using the most recently available set of experimental and theoretical nuclear data. We include revised opacity tables, take into account mass loss due to stellar winds, and implement revised weak interaction rates that significantly affect the properties of the presupernova core. An s-process is present, which, along with the usual nucleosynthesis from advanced burning stages and the explosion, produces nearly solar abundances for most nuclei up to A = 60 in the 25 M-circle dot star. Between A = 60 and A = 90 we find that the s-process leads to an over-production of key nuclei by a factor similar to 2 - 3. Above A = 90 the s-process has makes little contribution, but we find the approximately solar production of many proton-rich isotopes above mass number A = 120 due to the gamma -process.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Conference or Workshop Item, refereed
Conference or workshop item Subtype:Conference Paper
Publisher:Amerian Institute of Physics
Note:Publication type according to Uni Basel Research Database: Conference paper
Identification Number:
Last Modified:08 Jun 2012 06:54
Deposited On:08 Jun 2012 06:34

Repository Staff Only: item control page