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

Abstract

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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Michael Reese Hospital and Medical Center, Chicago, Illinois 60616
OSTI Identifier:
5134956
Resource Type:
Journal Article
Journal Name:
Med. Phys.; (United States)
Additional Journal Information:
Journal Volume: 13:5
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Muller-Runkel, R, Ovadia, J, Culbert, H, Cooke, R H, and Dolecek, E H. Neutron dose and energy spectrum outside a 20-MV accelerator treatment room. United States: N. p., 1986. Web. doi:10.1118/1.595840.
Muller-Runkel, R, Ovadia, J, Culbert, H, Cooke, R H, & Dolecek, E H. Neutron dose and energy spectrum outside a 20-MV accelerator treatment room. United States. https://doi.org/10.1118/1.595840
Muller-Runkel, R, Ovadia, J, Culbert, H, Cooke, R H, and Dolecek, E H. 1986. "Neutron dose and energy spectrum outside a 20-MV accelerator treatment room". United States. https://doi.org/10.1118/1.595840.
@article{osti_5134956,
title = {Neutron dose and energy spectrum outside a 20-MV accelerator treatment room},
author = {Muller-Runkel, R and Ovadia, J and Culbert, H and Cooke, R H and Dolecek, E H},
abstractNote = {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.},
doi = {10.1118/1.595840},
url = {https://www.osti.gov/biblio/5134956}, journal = {Med. Phys.; (United States)},
number = ,
volume = 13:5,
place = {United States},
year = {Mon Sep 01 00:00:00 EDT 1986},
month = {Mon Sep 01 00:00:00 EDT 1986}
}