Bases for the correct determination of resonance integrals of reactions leading to isomeric states: application to some reactions induced on zinc

Abstract

Abstract. The problems related with the departures from the ideal behaviour of the epithermal component of the neutron spectrum are discussed, in connection with the measurement of resonance integrals. The characteristics of the methods for the measurement of the α parameter are commented and the bases of a new method for the determination of mean effective resonance energy, developed at the authors' laboratory, are briefly described. On these grounds, the application to the correct measurement of the resonance integrals of 68 Zn(n,γ) 69m Zn, 70 Zn(n,γ) 71 Zn and 70 Zn(n,γ) 71m Zn is presented.

Characterization of neutron flux spectra in the irradiation sites of a 37 GBq 241 Am-Be isotopic source

“…Thus, a complete characterization of the neutron fields is a must for the accurate determination of the nuclear parameters such as effective resonance energies, thermal neutron and epithermal neutron cross sections for the isotopes via the neutron capture (n,c) reactions. For instance, lack of adequate characterization of the neutron spectra are the reasons for such discrepant values on the neutron induced reactions [5,6]. Hence, in this work, neutron flux spectra and flux parameters will be characterized in two different irradiation sites of an 241 Am-Be neutron source by taking into account all possible precautions together with use of the newest measurement protocols.…”