| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Available isotopes for Titanium (Z=22)
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
49Ti 50Ti
Cross sections do not include stellar enhancement factors! History
(Version 0.0 corresponds to Bao et al.) Comment
New rec. value is is average from eval. databases (endfb71, tendl15, jendl40). Uncertainty of 9.5% taken from ABM77 plus deviation between evaluations. Note that only the jeff32 evaluation reproduces the experimental value from ABM77 but uses a higher thermal xs than other evaluations (not the recommendation from Mug06 which is based on a single measurement from 1952). All other evaluations give a factor of 2 lower MACS. More investigation needed!!
Last review: May 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: endfb71, tendl15, 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: 1977,2016 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: Titanium
|