Neutron production in the interaction of 12 and 18 MeV electrons with a scattering foil inside a simple LINAC head

Characterization of photoneutron fluxes emitted by electron accelerators in the 4–20 MeV range using Monte Carlo codes: A critical review

“…The electroneutron production is foreseen to principally occur in the scattering foil, which is usually made of tungsten or tantalum and thick of a few tens of µm. In recent years, an increasing interest can be reported towards electroneutron production from medical accelerators [69][70][71][72][73]. In 2012, H.R.…”

Dosis equivalente ambiental H*(10) por neutrones producidos en un Varian Clinac 2300 mediante detectores tipo CR-39

“…Los electrones que conforman el haz cuando interactúan con las láminas de dispersión u otros materiales que conforman el cabezal del acelerador lineal producen interacciones electro-neutrónicas (e, e n) mediante fotones virtuales y fotones de Bremmsstrahlung [7] que, a su vez, pueden producir reacciones fotoneutrónicas (γ, n) en el que los fotones interaccionan con un blanco de Tungsteno (W) o Plomo (Pb) cuando estos están presentes en el cabezal del LINAC [8]. Dichos fotoneutrones pueden estar conformados por neutrones de evaporación o neutrones de "knock-out" [9].…”

The impact of treatment parameter variation on secondary neutron spectra in high-energy electron beam radiotherapy

“…Soto-Bernal et al (2017,2018) have performed Monte Carlo simulations to estimate the secondary neutron production and its spectrum from the Tungsten scattering foil inside the linac head [28,29]. Although these studies used a single component model with only the scattering foil [28], and a simple model that included a linac head [29], they were valuable contributions to our understanding of photoneutron and electroneutron production.…”

“…Soto-Bernal et al (2017,2018) have performed Monte Carlo simulations to estimate the secondary neutron production and its spectrum from the Tungsten scattering foil inside the linac head [28,29]. Although these studies used a single component model with only the scattering foil [28], and a simple model that included a linac head [29], they were valuable contributions to our understanding of photoneutron and electroneutron production. However, it is important to experimentally measure the electroneutron spectrum because the primary spectrum emanating from the linac is modified by the materials in the treatment room, as well as the primary and secondary barriers.…”