Introduction: GRID therapy is a treatment modality in which a high dose of radiation in a single fraction is given to the tumor. This technique previously was used to treat bulky tumors with orthovoltage beams. Recently, studies have been conducted to suggest that GRID therapy with megavoltage photons can be useful in palliative treatments. On the other hand, there has always ...

In the frame of a long-term research program on characterization large radioactive waste packages by photofission, Nuclear Measurement Laboratory CEA IRESNE, France, has measured cumulative photofission yields 235U and 238U short-lived long-lived fission products using Bremsstrahlung photon beam produced 16 MeV electron linear accelerator (LINAC). To this aim, been carried out activation analys...

The ground state half-lives of 69Ge, 73Se, 83Sr, 63Zn, and the half-life 1/2− isomer in 85Sr have been measured with high precision using photoactivation technique at an unconventional bremsstrahlung facility that features a repurposed medical electron linear accelerator. γ-ray activity was counted over about 6 high-purity germanium detector, enclosed into ultra low-background lead shield. are:...

Brass mesh bolus has been shown to be an acceptable substitute for tissue-equivalent bolus to increase superficial dose for chest wall tangent photon radiotherapy. This work investigated the increase in surface dose, the change in the dose at depth, and the safety implications of higher energy photon beams when using brass mesh bolus for postmastectomy chest wall radiotherapy. A photon tangent ...

This paper characterizes the functional dependence of the giant dipole resonance neutron yield produced by electrons in terms of the atomic number (Z) and thickness (T) of the target. The yields were calculated by integrating, over the photon energy, the product of the differential photon track length and published photoneutron cross sections. The EGS4 Monte Carlo code and analytical formulas w...

This study of doses to patients from emitted photoneutrons in a medical linear accelerator (Varian 2100C) was carried out. Dose calculation was performed using Monte Carlo Geant4 code. The model was used to calculate the neutron fluence, as a function of the neutron energy inside the treatment room to estimate the effective dose to patients. The ambient dose equivalent versus field size for pat...

In this study, we compared double differential cross-sections (DDXs) between the experimental data obtained by 16.6 MeV of polarized photons and DDXs from JENDL2004 JENDL/PD-2016.1 for 197 Au, nat Pb, Cu, Ti targets. Using Python-based software, extracted nuclear libraries (NDLs), which were subsequently deduced considering abundances each target’s isotopes, width photon beam, energy resolution...

Pohang Neutron Facility (PNF) is a pulsed neutron facility based on the 100-MeV electron linear accelerator. It was constructed for nuclear data production in Korea, and it consists of an electron linear accelerator, a watercooled Ta target with a water moderator and a time-offlight path with an 11 m length. The 100-MeV electron linac uses a thermionic RF-gun, an alpha magnet, four quadrupole m...

It is difficult to reveal smuggled U-bearing material by passive gamma-detection, because the weak radiation can easily be shielded. Neutrons, as penetrate shielding, represent a detection potential, by inducing fission in the nuclear material. A 4 MeV linear accelerator was used as a pulsed neutron source for active interrogation of U-bearing material. Produced in heavy water by bremsstrahlung...