International Reactor Dosimetry File 2002 - IAEA Publications

— 10 B(n,α) 7 Li and 6 Li(n,t) 4 He: The uncertainty of the library crosssections
in the intermediate neutron energy region is too small (not
realistic) compared with the corresponding C/E values (or the
library data deviate significantly from the experimental values).
— 23 Na(n,γ) 24 Na: The uncertainty information contains only a diagonal
matrix — a new evaluation is required.
— 55 Mn(n,γ) 56 Mn: The C/E value for the resonance integral deviates by
16% from unity — excessive when compared with the related
uncertainty values; a new cross-section evaluation is needed in the
intermediate neutron energy region.
— 58 Fe(n,γ) 59 Fe: The C/E value for the resonance integral with the
Mughabghab data deviates by 19% from unity. A large difference is
also found between the recommended experimental data for the
sources considered. Clarification of this discrepancy is necessary
because this reaction is one of the most frequently used detectors in
reactor dosimetry. A new cross-section evaluation in the intermediate
neutron energy region should also be considered.
— 93 Nb(n,γ) 94 Nb: The C/E value for the resonance integral deviates by
17% from unity; furthermore, the uncertainty information contains
only a diagonal matrix — a new evaluation is required.
— 109 Ag(n,γ) 110 Ag m : Mughabghab data represent the sum of the
reaction cross-sections leading to 110 Ag m+g , while the evaluated data
libraries contain only cross-section data for the 109 Ag(n,γ) 110 Ag m
reaction. Therefore, no comparison with the Mughabghab data was
possible.
— 115 In(n,γ) 116 In m : In the present library the cross-section leading to the
metastable states of the product nucleus 116 In is given; uncertainty
information contains only a diagonal matrix — a new evaluation is
required.
— 181 Ta(n,γ) 182 Ta: The uncertainty information contains only a diagonal
matrix — a new evaluation is required.
— 197 Au(n,γ) 198 Au: The available uncertainty information for this
reaction is not reliable; similar data have been withdrawn from
ENDF/B-VI. Uncertainty data in IRDF-90 were derived from the
same source — a new evaluation is required.
— 232 Th(n,γ) 233 Th: The uncertainty information below 15 eV is defined
only in terms of a diagonal matrix — a new evaluation is required.
— 235 U(n,f): The uncertainty information has been declared to be
unreliable, and has been withdrawn from ENDF/B-VI. Data in
IRDF-90 have the same origin — a new evaluation is required.
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