title: Energy dependence of the neutron sensitivity of C--CO2, Mg--Ar and TE--TE ionisation chambers.
abstract: The neutron sensitivity relative to 60Co of commercially available C--CO2, Mg--Ar and TE--TE ionisation chambers was measured as a function of energy from 1 to 44 MeV. The sensitivity function was obtained by the method of Kuchnir, Vyborny and Skaggs from differences in measurements made at two angles in mixed fields having an isotropic gamma-ray component. Such fields were produced by bombardment of a thick beryllium target with 16 and 28 MeV deuterons, 44 MeV 3He-ions and 35 and 46 MeV protons. The results show that the relative neutron sensitivity of the C--CO2 and Mg--Ar chambers increases continuously with energy, whereas that of the TE--TE chamber is relatively constant.
mesh_terms: D001128:Argon; D002244:Carbon; D002245:Carbon Dioxide; D005214:Fast Neutrons; D008274:Magnesium; D009502:Neutrons; D011874:Radiometry / Q000295:instrumentation*; D014894:Weights and Measures
chemical_list: D002245:Carbon Dioxide; D001128:Argon; D002244:Carbon; D008274:Magnesium