Estimation of neutron kerma in biological tissue containing boron and gadolinium compounds for neutron capture therapy
نویسندگان
چکیده
where kD=1.602 10 Gy⋅g/MeV — energy conversion factor from MeV to Gy×g, (obtained from the known ratio: 1 MeV=1.602 10 J); Е – neutron energy, MeV; Ф(r,Е) dE – neutron flux in the point r on the energy interval dE, neutron/cm/s: ni – atomic density of the i-th nuclide of the medium, atom/cm; σij(E) –microscopic cross-section of reaction j at interaction of a neutron with energy Е on the i-th nuclide of medium, cm/atom; ) (E Eij average energy released in reaction j at interaction of a neutron of energy Е on the i-th nuclide of medium, MeV; ρ(r) mass density of medium, g/cm; wi(r,t)relative mass fractions of nuclides in the medium, accounting for their distribution in time t; ki(E) – energy dependence of specific partial kerma of the i-th nuclide (kerma factor):
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