Resonance neutron capture in 60Ni below 450 keV

✍ Scribed by F. Corvi; G. Fioni; F. Gunsing; P. Mutti; L. Zanini

• Book ID: 104335051
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 301 KB
• Volume: 697
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(01)01267-2

✦ Synopsis

High-resolution neutron capture cross-section measurements on 60 Ni have been performed at the Geel Linear Accelerator in the energy range from 1 to 450 keV. An experimentally determined weighting function, obtained by a total energy detection set-up, has been applied to the measured capture spectra. The parameters of 275 resonances have been determined in a recent reanalysis using the FANAC R-matrix shape fitting code. Accurate values of the maxwellian-averaged capture cross section for stellar temperatures ranging from kT = 5 to 100 keV, corresponding to different scenarios of s-process stellar nucleosynthesis, have been calculated. The distributions of partial radiative widths for s-and p-wave resonances have been derived. A correlation of 0.64 between capture and reduced neutron widths is compatible with the presence of nonstatistical effects in the capture of 60 Ni.