Abstract
We have measured the neutron capture cross sections of the stable magnesium isotopes Mg in the energy range of interest to the process using the neutron time-of-flight facility n_TOF at CERN. Capture events from a natural metal sample and from samples enriched in Mg and Mg were recorded using the total energy method based on CH detectors. Neutron resonance parameters were extracted by a simultaneous resonance shape analysis of the present capture data and existing transmission data on a natural isotopic sample. Maxwellian-averaged capture cross sections for the three isotopes were calculated up to thermal energies of 100 keV and their impact on -process analyses was investigated. At 30 keV the new values of the stellar cross section for Mg, Mg, and Mg are 3.80.2 mb, 4.10.6 mb, and 0.140.01 mb, respectively.
5 More- Received 9 January 2012
DOI:https://doi.org/10.1103/PhysRevC.85.044615
©2012 American Physical Society