Plase tel me ?

  1. what is deffrence between nutron energy spectrum and nutron flux
     
  2. jcsd
  3. Astronuc

    Staff: Mentor

    Neutron energy spectrum is simply a description of the neutron population by energy, without any spatial reference. Neutron flux is a spatial description, the number of neutrons passing through a unit area per unit time.

    However, neutron flux could be energy dependent, i.e. one can refer to a thermal flux, that is the flux of neutrons whose energies are below some particular energy (e.g. 0.025 eV). Or one can refer to a fast flux with E > 0.82 MeV or 1 MeV. The energy cut off is arbitrary.

    If flux on has energy dependent flux, [itex]\phi(x,y,z,E)[/itex], then on can integrate over the entire energy spectrum or a portion of the energy spectrum to obtain the spatial flux for that range of energies, which would be [itex]\phi(x,y,z)[/itex].
     
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