Validation of an indium-based multi-shell neutron spectrometer.

A multi-shell neutron spectrometer with indium foil detector (In-MuNS) was developed to evaluate intense neutron fields that are generated in medical accelerators. The response matrix of this new spectrometer was calculated from 1 meV to 100 MeV using MCNP5 v.1.

Evaluation of time-dependent strengths of californium neutron sources by decay of Cf, Cf, and Cm: Uncertainties by Monte Carlo method.

A method for estimating source strength measurements of californium neutron sources is presented, based on the model of Cf, Cf, and Cm decay. This is combined with the Monte Carlo method (MCM) of propagating uncertainties. Californium sources were categorized into two types: Sort-A are those with most input quantities known while Sort-B are sources with only the mass at a certain reference date known.