Abstract:
Calculation of particle or photon flux in three dimensions is needed to facilitate the
observation and the real approach of radiation to the observed object. Calculation of the flux of
radiation received on an object's surface can be done using the MCNP-5 particle transport
program (Monte Carlo N particle-5). In this study, the radiation source is a neutron particle
emitted from the center of the ball with a radius of 0.5 cm with 16 MeV of energy on an
object's surface of an iron ball with a radius of 0.5 cm. The source of neutrons and irradiated
objects is in a cube vessel, with a side length of 10 cm and 20 cm. This simulation can be
useful as a model for calculating the impact of radiation exposure on the surface of objects in
human organs. Flux and the magnitude of the radiation particle's track on the object's surface
are calculated based on changes in media material, media size and number of radiation
particles (NPS). The results showed that the flux and particle track received by the surface of
an object were greatly influenced by the media material and media size and the NPS value of
the radiation particles.
