In this study, a semi-empirical calibration method for NORM samples measurement by using LaBr3(Ce) scintillator was developed based on combination of experimental gamma spectrometry measurements and MCNP-X simulations. The aim work is to provide us with full energy peak efficiency curves in wide photon range which particular importance when selected energies 234Th, 214Pb, 214Bi, 228Ac, 208Tl 22...

The aim of this study is the development of a methodology to reconstruct the image of detail defects from a mammographic phantom employed in quality control testing. The MCNP-4c2 code has been used to model the mammography unit and the CIRS 11A (MAMMO PHANTOM SP01) mammographic phantom. This phantom is made of poly-methyl methacrilate and contains a reference point, contrast and resolution deta...

BACKGROUND Treatment of choroidal melanoma with radiation often involves placement of customized brachytherapy eye-plaques. However, the dosimetric properties inherent in source-based radiotherapy preclude facile dose optimization to critical ocular structures. Consequently, we have constructed a novel system for utilizing small beam low-energy radiation delivery, the Beamlet Low-kVp X-ray, or ...

Neutron dose-equivalent buildup factors were calculated for point isotropic neutron sources irradiating infinite slablike shields of lead, iron and water using the MCNP code. The factors are presented for some source neutron energies in the range from 0.025 eV to 14 MeV, and for shield thicknesses from 0.5 to 10 mfp. Since the MCNP code considers all kinds of neutron interactions with matter, a...

When designing experiments for full-scale reactor systems, the Monte Carlo N-Particle® and Whisper codes can be used to create neutronic models compare similarity of two nuclear systems via correlation coefficients keff, effective multiplication factor. This paper applies this framework a conceptual heat pipe yttrium-hydride-moderated microreactor system experiments, but method applied generall...