The set Au - Zr - Mo - Cr - Lu as multiple reactor flux monitor: The performance of Zr-96 and the analysis of inconsistencies

• Autores: Montoya, Eduardo, Mendoza, Pablo, Bedregal, Patricia, Ubillús, Marco, Torres, Blanca, Cohen, Isaac
• Formato: artículo
• Fecha de Publicación: 2008
• Institución: Instituto Peruano de Energía Nuclear
• Repositorio: IPEN-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.ipen.gob.pe:20.500.13054/527
• Enlace del recurso: https://hdl.handle.net/20.500.13054/527
• Nivel de acceso: acceso abierto
• Materia: Análisis por activación neutrónica; Flujo de neutrones; Neutrones epitérmicos; Reacciones de circonio 96; Reacciones de molibdeno 98

The simultaneous use of Au, Zr, Mo, Cr and Lu, for the characterization of irradiation facilities with the purpose of parametric neutron activation analysis, reveals some systematic inconsistencies in the determination of the values of the relevant parameters: thermal and epithermal fluxes, as well as the exponent alpha (α), which describes the non ideal behaviour of the epithermal neutron flux. An experimental case is presented, showing that when the determined values are optimal for the reaction 96Zr(n,ɣ)97Zr, can be unacceptably discrepant for the reactions 98Mo(n,ɣ)99Mo and 50Cr(n,ɣ)51Cr, and vice versa. Under the conditions of this work, it has been found that the pair of reactions 96Zr(n,ɣ)97Zr and 98Mo(n,ɣ)99Mo does not lead to a single solution for the values of the thermal and epithermal neutron fluxes, independently of the values given for the parameter α.