Thermal neutron flux measurements in the STAR experimental hall

We report measurements of thermal neutron fluxes at different locations in the STAR experimental hall during RHIC Run 13 with proton–proton collisions at s = 510 GeV . We compare these measurements to calculations based on PYTHIA as a minimum bias event generator, detailed GEANT3 simulation of the STAR detector and experimental hall, and with GCALOR as the neutron transport code. A fairly good agreement was found between simulation and measurements.