A simple comparison of adjusted data sets for iron based on measuremets in ASPIS and in the cores of fast reactor criticals

The object of this comparison is to determine whether the adjustement sets for iron obtained in one case from integral measurements in ASPIS fission source and in another case from the cores of fast reactor criticals produce the same effect when used in calculations. The reasons that they may produce different effects are: (a) the adjustements may reflect shortcomings in the way integral quantities are calculated from data, for example approximations in transport theory or group averaging errors, rather than errors in nuclear data; (b) the quantities measured in ASPIS and the cores of fast reactor criticals have different sensitivities to iron cross-sections so the adjustements may be complementary rather than equivalent, for example they may span different energy ranges; (c) the standard deviations assumed for the differential data may be unrealistic. Again this will give rise to adjustements which do not reflect real errors in nuclear data