Related Experiment Video
Updated: Aug 21, 2026

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
A study of neutron spectra from medical linear accelerators
A Facure1, R C Falcão, A X Silva
1Comissão Nacional de Energia Nuclear, R. Gal. Severiano 90, sala 405, 22294-900, Rio de Janeiro, RJ, Brazil.
Abstract:
Medical accelerators with photon energies over 10 MeV generate an undesired fast neutron contamination in the therapeutic beam. In this work, the Monte Carlo code MCNP was used to simulate the transport of these photoneutrons across the head of various medical accelerators of high energy. The average and most probable neutron energies were obtained from these spectra, before and after crossing the accelerator shielding. The degradation of these spectra, when they cross concrete barriers with thickness which vary between 25 and 100 cm, was also studied.
More Related Videos
08:48High-Resolution Neutron Spectroscopy to Study Picosecond-Nanosecond Dynamics of Proteins and Hydration Water
Published on: April 28, 2022
09:18Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
Published on: December 14, 2017
Related Concept Videos
Nuclear Magnetic Resonance (NMR): Overview
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
Atomic Emission Spectroscopy: Overview
Positron Emission Tomography
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
NMR Spectrometers: Resolution and Error Correction