Measurement of k0 values for europium, lutetium and iridium at FRM II with a very well thermalized neutron spectrum

Abstract The k 0 values of 6 non-1/ v nuclides ( 152 Eu, 152m 154 177 Lu, 192 Ir and 194 Ir) were determined using the extended Høgdahl formalism at research reactor FRM II with very high f values. Standards irradiated in 4 channels different local temperatures between 40 °C 55 measured temperature sensitive irreversible labels. A good agreement recommended was found for Eu Lu original g T n ) factors by Gryntakis, however, this work 7% higher. New also Van Sluijs. Differences up to 6% isotopes compared could be confirmed = 1. theoretical calculated new nuclear data. They are less than present showed a similar trend. influence on determination investigated.