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

Journal Article · Mon Sep 01 04:00:00 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), Journal Name: Med. Phys.; (United States) Vol. 13:5; ISSN MPHYA
• Country of Publication: United States
• Language: English

Related Subjects

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