title: Radiation Dosimetry of a Graphite Moderated Radium-Beryllium Source.
abstract: The Brookhaven National Laboratory Sigma Pile is a radium-beryllium neutron source imbedded in a cube of graphite blocks. The pile is approximately 2.13 m on four sides and is 3.07 m high. Thermoluminescent dosimeters were used to determine the neutron and gamma-ray dose rates in the pile. Gamma-ray dose rate measurements have also been made in the air outside of the pile, while the radium-beryllium neutron source was being withdrawn from the pile. The Monte Carlo code has been used to calculate the coupled neutron-photon transport. Measured dose rates at various locations agreed with the calculated values within 5% to 15%.
authors.affiliation: *Brookhaven National Laboratory. Upton, NY 11973-5000.
authors.forename: Norman E
authors.initials: NE
authors.lastname: Holden
authors.forename: Richard N
authors.initials: RN
authors.lastname: Reciniello
authors.forename: Jih-Perng
authors.initials: JP
authors.lastname: Hu