CODE | NUCLIDE | ORIGINAL DATA TAKEN FROM | MODIFICATION | ADDITIONAL FILE MODIFICATIONS | ORIGINAL DATA TAKEN FROM | MODIFICATION | ADDITIONAL FILE MODIFICATIONS | COMMENTS |
1014029 | 014_Si_029 | ENDF/B-VI MOD 3 | Revision, November 1999, N.M. Larson (ORNL) For this revision, the format change adopted by CSEWG (November, 1999) to provide channel-spin information for Reich-Moore resonance parameters is in use. [When the value for AJ is negative, the lower value for the channel spin is to be used; when AJ is positive, the higher value for channel spin is to be used; for AJ = 0, the channel spin is equal to the orbital angular momentum. In all cases the total angular momentum is given by the absolute value of parameter AJ.] In all other respects, this revision is identical to the MOD 2 evaluation. |
COVARIANCES, July, 2011, S. Hoblit, BNL New BNL estimates in the resonances region were obtained with the kernel approach. We note that resonance region for Si extends to fairly high energies, in particular for 28-Si up to 2.7 MeV. Included in our evaluation were resonance parameter uncertainties taken over from Atlas of Neutron Resonances. Dominant contribution to elastic scattering uncertainties comes from the uncertainty of the scattering radius R'. Covariances in the resonance region were merged with the covariances in the fast neutron region taken from the ENDF/B-VI.8. We reviewed the latter data and concluded that they are reasonable with the exception of MT=104 covariances which were considered to be problematic and hence they have been removed. |
Oct 22,2004, Holly Trellue remade mf6mt5 using corrected gnash code, to fix an earlier bug. Impact is reduced sec. particle prod. for new ENDF/B-VII release |