Skip Navigation


Radiation Protection Dosimetry Advance Access originally published online on December 4, 2006
Radiation Protection Dosimetry 2006 122(1-4):80-81; doi:10.1093/rpd/ncl405
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
122/1-4/80    most recent
ncl405v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Pomplun, E.
Right arrow Articles by Kümmerle, E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Pomplun, E.
Right arrow Articles by Kümmerle, E.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Estimation of a radiation weighting factor for 99mTc

E. Pomplun1,*, M. Terrissol2 and E. Kümmerle1

1 Geschäftsbereich Sicherheit und Strahlenschutz, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
2 CPAT, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cédex 9, France

* Corresponding author: e.pomplun{at}fz-juelich.de


  Abstract

Decaying 99mTc does not only emit a gamma ray (140.5 keV), but also low-energy Auger and conversion electrons. These electrons cause a serious problem in the determination of a radiation weighting factor for 99mTc due to their extremely short range in tissue. Therefore, for comparison ultrasoft X rays are used here, which deposit their energy mainly via the photoeffect thus also initiating low-energy photoelectrons. Monte Carlo computer codes provided electron emission spectra of 99mTc and subsequent track structure calculations simulated the induction of DNA damage of different degrees of complexity. For the modelling of ultrasoft X rays carbon K photons with an energy of 270 eV were selected, for which experimental results are available from the literature. On average, four electrons were found to be emitted per 99mTc decay. Simulation of DNA damage revealed a nearly identical spectrum of primary strand breaks for 99mTc and C–K radiation. On this basis, a total radiation weighting factor of 1.2 was evaluated for 99mTc.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.