This study measured the amount of pollution of fast and slow neutrons generated from a Elekta Synergy linear accelerator, using various photons and electrons and two bubble detectors, BDT and BD-PND. The BDT bubble detector is preferentially sensitive to thermal neutrons. The BDPND is the recommended detector for personal neutron dosimetry.First, 10-MV photon radiation fields of 40×40 cm, 30×30...

Particles contained in cosmic galactic rays enter the earth's atmosphere and collide with atoms of atmospheric gases. These collisions produce a wide variety of sub-atomic particles, many of which recombine quickly. However, a significant quantity of high-energy neutrons are also produced by these collisions. Neutrons possess no electrical charge, and do not recombine; instead, they are slowly ...

The molecule-like structure of the C isotopes (A=12, 14, 16) is investigated using a microscopic α+α+α+n+n+· · · model. The valence neutrons are classified based on the molecular-orbit (MO) model, and both π-orbit and σ-orbit are introduced around three α-clusters. The valence neutrons which occupy the π-orbit increase the binding energy and stabilize the linear-chain of 3α against the breathin...

Accurate neutron flux values in irradiation channels of research reactors are very essential to their usage. The total neutron flux of the Ghana Research Reactor-1 (GHARR-1) was measured after a beryllium reflector was added to its shim to compensate for excess reactivity loss. The thermal, epithermal and fast neutron fluxes were determined by the method of foil activation. The experimental sam...

We treat the production of neutrons, photons, and neutrinos through photomeson interactions of relativistic protons with ambient photons in the compact inner jets of blazars. Internal synchrotron and external isotropic radiation due to scattered optical/UV accretion-disk radiation are considered as target photon fields. Protons are assumed to be accelerated to a maximum energy limited by the si...

Two methods were elaborated for calculation of the kinetic effects caused by the photo-neutrons emitted in beryllium reflector of the VVRSZM type research reactor of KFKI-AEKI. The first simplified point kinetic model assumes that the importance of photo-neutrons is the same as that for the neutrons originated from the fission events. The point kinetic parameters were calculated by using the mo...

We present recent work in the development of two new types of compact portable neutron generators, axial and field desorption, to be used for associated particle imaging and brachytherapy. The lightweight and small size of these neutron generators allow for greater versatility than current neutron sources that require heavy shielding and large spaces to operate. In these sources, neutrons are c...