title: [Investigation of spectral scatter photon fluence of needle ray beams (author's transl)].
abstract: Extending the Monte Carlo calculations of the scatter dose distribution of needle ray beams performed earlier, the dose distribution was determined as a function of spectral scatter photon fluence. From the disappearance of dose contributions to certain group fluences there has to be concluded that definite parts of spectral photon fluence also must vanish. The results show the existence of interfaces which are effective for scatter photons with distinct levels of energy. Dependence of the interfaces on the limitation of the absorbing space and on the energy of primary photons is being investigated.
mesh_terms: D000042:Absorption; D008433:Mathematics; D011827:Radiation; D011829:Radiation Dosage; D012542:Scattering, Radiation
vernacular_title: Untersuchung der spektralen Streuphotonenfluenz von Nadelstrahlen.