Study of neutron response of a detector SP9 Helium-3 with Am-Be source; Estudio de la respuesta neutronica de un detector SP9 de Helio-3 con fuente de Am-Be

The CIEMAT has a BSS which includes as a proportional counter detector spherical 3He SP9 type (Centronic Ltd, United Kingdom), calibrated at the PTB (Germany). This paper has been simulated in detail the detector and different irradiation configurations include exposure to moderate neutron field produced by a Howitzer and irradiation device in the area of the spectrometer. This code has been used MCNPX.