# SN0593 : Thermal neutron flux measurements in STAR experimental hall.

 Author(s) : Y. Fisyak, O. Tsai, Z. Xu Date : Nov. 30, 1999 File(s) : NeutronI.pdf Abstract : We report on measurements of thermal neutron fluxes at different locations  in the STAR experimental hall during  pp $\sqrt s$ = 510 GeV Run 13 at RHIC. We compared these measurements with calculations based on \textsc{PYTHIA} as minimum bias events generator,  the detailed GEANT3 simulation of the STAR detector and the experimental hall, and using GCALOR as neutron transport code.   A good (within $\approx$ 30\%) agreement was found at locations near ($\approx$1m) and very far ($\approx$10m) from the beam pipe.  For intermediate locations ($\approx$ 5m) the simulation overestimates neutron flux by a factor of $\approx$3. Keywords : Category : Technical