Measurement of k 0 and Q 0 values for lutetium and europium

Abstract

It was shown that the k0-method using the recently developed extended Hogdahl formalism for non-1/v nuclides and neutron temperatures from thermocouple readings can give k0-NAA results for Eu and Lu accurate to about 1 %. The necessary Q0 and k0 values for 151Eu(n,γ)152Eu, 151Eu(n,γ)152mEu and 176Lu(n,γ)177Lu were measured by reactor irradiation of certified standards and gamma-ray counting. The present measurements of k0-values did not confirm the previously published values; they were higher by 6 % for 152Eu and by 16 % for 152mEu.