“…To explore the benefits of muon momentum measurement in nuclear safeguards, e.g., special nuclear material (SNM) monitoring, three spherical special nuclear material samples, i.e., significant amounts (SQ) of high-enriched uranium (HEU), low-enriched uranium (LEU), and plutonium (Pu), were studied using Monte Carlo simulations where they were surrounded by various thicknesses of lead shielding. 5 × 10 3 muons were used to build scattering angle variance distributions [38,39]. In Figure 7, the mean scattering angle variance of distributions for HEU, LEU, and Pu are plotted as a function of thickness of lead shielding with 2σ errors when the muon momentum follows a cosmic ray muon spectrum with p µ = 0.2-100.0 GeV/c (left column) and p µ = 3 GeV/c (right column).…”