PROPOSAL FOR IMPROVEMENT METHOD OF NEUTRON STRENGTH IN THE NEUTRON RADIOGRAPHY

Characterization of a Neutron Collimator for Neutron Radiography

At the ENEA TRIGA research reactor (Casaccia Research Center, Rome), a new neutron collimator has been designed and installed at the neutron tangential channel. This collimator, that is part of a neutron/X-ray facility for NDT analysis, was experimentally characterized and optimized in terms of thermal neutron flux, its spatial/energetic distribution, photon air KERMA and effective beam diamete...

Discrete tomography in neutron radiography

Discrete tomography (DT) is an imaging technique for reconstructing discrete images from their projections using the knowledge that the object to be reconstructed contains only a few homogeneous materials characterized by known discrete absorption values. One of the main reasons for applying DT is that we will hopefully require relatively few projections. Using discreteness and some a priori in...

Neutron Radiography as a Ndt Method in Archaeology

Applications of NR in archaeology are indicated when searching for the presence of materials containg hydrogen like organic materials wood, fabrics, leather, or corrosion products and by metals, in particular heavy metal lead. In the recent years the thermal neutron radiography (NR) has become a common non-destructive examination method at the National Museum of Slovenia, usefully complementing...

Neutron Radiography, Techniques and Applications

After describing the principles of the "in pool" and "dry" installations, techniques used in neutron radiography are reviewed. Use of converter foils with silver halide films for the direct and transfer methods is described. Advantages of the use of nitrocellulose film for radiographying radioactive objacts are discussed. Dynamic imaging is shortly reviewed. Standardization in the field of neut...

Non-destructive Testing: Neutron Radiography