Neutron dose and energy spectrum outside a 20-MV accelerator treatment room

Journal Article · Mon Sep 01 00:00:00 EDT 1986 · Med. Phys.; (United States)

DOI:https://doi.org/10.1118/1.595840· OSTI ID:5134956

Muller-Runkel, R; Ovadia, J; Culbert, H; Cooke, R H; Dolecek, E H

A maze design is discussed for a Therac 20 linear accelerator (manufactured by Atomic Energy of Canada, Ltd.) which reduces the flux of neutrons at the door to permissible levels in controlled areas. The L-shaped design allows for a relatively light door at the end of the maze, consisting of 5.08-cm (2-in.) borated polyethylene and 2-mm lead. A comparison is made between the neutron dose equivalent (DE) calculated by various methods and the DE measured with a variety of portable neutron survey meters. In addition, the neutron energy spectrum outside the maze at 1 m from the door, measured with a polyethylene multisphere LiI system, is reported.

• Research Organization: Michael Reese Hospital and Medical Center, Chicago, Illinois 60616
• OSTI ID: 5134956
• Journal Information: Med. Phys.; (United States), Vol. 13:5
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
LINEAR ACCELERATORS
NEUTRON LEAKAGE
RADIOTHERAPY
NEUTRON DOSIMETRY
DOSE EQUIVALENTS
NEUTRON FLUX
NEUTRON SPECTRA
SHIELDING
ACCELERATORS
DOSIMETRY
MEDICINE
NUCLEAR MEDICINE
RADIATION FLUX
RADIOLOGY
SPECTRA
THERAPY
430100* - Particle Accelerators- Design
Development
& Operation