A new monitor for routine thermal and epithermal neutron fluence rate monitoring in k0 INAA

The Zr–Au set for monitoring the thermal and epithermal neutron fluence rate and the epithermal spectrum parameter α is not always practicable for routine application of INAA in well-thermalized facilities. An alternative set consisting of Cr, Au and Mo provides values for the thermal neutron fluence rate, f and α that are not significantly different from those found via the Zr–Au method and the Cd-covered Zr-method. The IRMM standard SMELS-II was analyzed using the (Au–Cr–Mo) monitor and a good agreement was obtained.