P4 Group is an alliance of researchers from the Comisión Chilena de Energía Nuclear (CCHEN), the University of Chile and the Universidad de Talca. At present is mainly supported by the Programa de Investigación Asociativa CONICYT-Chile, under grant Anillo ACT-172101. Previously was supported by the same program under grant Anillo ACT-1115 and by the Programa Bicentenario de Ciencia y Tecnología (PBCT), under grant Anillo ACT-26.