The experimental studies on the cosmic-ray neutron energy spectrum and the neutron dose rate were performed in the Mt.Fuji area (altitude: 40m – 2400m) by using a Multi-sphere neutron Spectrometer (Bonner Sphere: BS) with the 5.07-cm diam. spherical He-3 proportional counter to assess the natural background neutron dose rate in Japan with good accuracy. The spectra measured at each altitude wer...

This paper presents the validation of the Monte Carlo code MCNP-PoliMi for the simulation of nuclear safeguards experiments with plutonium and uranium metal based on fast time-correlation measurements. A comparison is presented between experimental data acquired with the Nuclear Materials Identification System and the Monte Carlo simulations. The measurements and simulations were performed for ...

This paper demonstrates, through MCNPX simulations, that a compact hexagonal array of detectors can be utilized to do both gamma isotopic identification (ID) along with neutron identification while simultaneously finding the direction of the source relative to the detector array. The detector array itself is composed of seven borated polyvinyl toluene (PVT) hexagonal light pipes approximately 4...