| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Available isotopes for Iron (Z=26)
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
57Fe 58Fe
Cross sections do not include stellar enhancement factors! History
(Version 0.0 corresponds to Bao et al.) Comment
Rec. value is reported value from latest nTOF measurement (GG14). Energy dependence for MACS vs. kT table from averaged dependencies of endfb71 and jendl40. Uncertainties for extrapolations from covariances of endfb71. Additional uncertainty for kT=5-15 keV due to different energy dependencies of evaluations.
Note that there is a discrepancy between the most recent nTOF measurement (GG14), the evaluated libraries (endfb71, jendl40 - which use the resonance parameters from AMT79 (s wave) and BSE74 (p wave)), and the measurements from WLK09 and RBC83. Last review: December 2016 List of all available values
Original:MACS [<σ v>/vT] (mb) for kT=30 keV, based on the published cross sections except where indicated otherwise. Renorm:MACS [<σ v>/vT] (mb) for kT=30 keV for which the reference or standard cross section was meanwhile improved. Type: The letters and numbers in the column labelled 'type' give information on how the cross section has been obtained:
MACS, SEF and Reaction Rates for different energies
MACS: Reference: GG14,endfb71,jendl40 Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.) Year: 2016 X-factor: Reference: Year: SEF (Stellar enhancement factor): Reference: Year: Comment: Rate: Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF Chart of nuclei
Isotope: Iron
|