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Radiation Protection Dosimetry Advance Access published online on May 12, 2006
Radiation Protection Dosimetry, doi:10.1093/rpd/ncl047
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Received December 6, 2005
Revised March 23, 2006
Accepted March 26, 2006

SCIENTIFIC AND TECHNICAL PAPER

DETERMINATION OF AMBIENT AND PERSONAL DOSE EQUIVALENT FOR PERSONNEL AND CARGO SECURITY SCREENING

O. Hupe 1 * and U. Ankerhold 1

1 Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany

* To whom correspondence should be addressed.
O. Hupe, E-mail: oliver.hupe{at}ptb.de


  Abstract

In the past few years, imaging technology using ionising radiation has been gaining in importance for the screening of goods and persons for security reasons and in order to detect contraband. For radiation protection purposes it is extremely important to know that dose persons are exposed to when passing through a personnel scanner or, as a stowaway, in a cargo scanner, so as to remain within the prescribed dose limits. Within the scope of a research project, measurements were performed on different types of personnel X-ray scanners as well as cargo X-ray scanners, using the transmission and/or the backscattering method. All scanners investigated operate with a high dose rate and use short irradiation time. Owing to this method of scanning reliable values can only be determined for the personal and ambient dose equivalents, Hp(10) and H*(10), by using a specially developed measuring system. The aim of this project was to determine the range of magnitudes of doses for representative personnel and cargo X-ray scanner systems. Depending on the type of scanner, the determined dose values for personnel scanners range from 0.07 µSv to 6 µSv. Measurements and instruments used in this study are described and the dose values obtained are discussed in detail.


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