Li, X. ; Lierse von Gostomski, C.

2014-03-
Springer Science + Business Media B.V Dordrecht [u.a.]

Abstract: The research reactor FRM II offers different irradiation facilities with highly thermalized neutron flux. 3 facilities for the k 0 neutron activation analysis (k 0 NAA) will be introduced shortly. The influence of flux parameter α on the concentration calculation of samples irradiated in a neutron field with very high ratio of thermal to epi-thermal neutron flux f > 1,000 are here investigated. Even for the most k 0 isotopes with big Q 0 values, the uncertainty of a concentration calculation without α correction is <3 %, when the f value larger than 3,000. The uncertainty is about 5 % for the isotope 96Zr in this case. The k 0 library of the computer program MULTINAA is updated. A standard reference material IAEA/soil-7 was analyzed to verify the k 0 NAA at FRM II.

Keyword(s): Instrument and Method Development (1st) ; Others (1st) ; Instrument and Method Development (2nd) ; Physics and Chemistry General

1. IRRAD

1. Instrumental Neutron Activation Analysis