Does concrete composition affect photoneutron production inside radiation therapy bunkers? View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2012-02

AUTHORS

Asghar Mesbahi, Ali-Asghar Azarpeyvand, Hamid Reza Khosravi

ABSTRACT

PURPOSE: Different types of concretes are used for bunker construction for radiation therapy. As neutron production occurs in high-energy photon beams, the purpose of this study was to investigate the effect of different concretes on photoneutron doses at an isocenter and maze entrance door. MATERIALS AND METHODS: The 18-MV photon beam of a Varian 2100 C/D linear accelerator and a radiation therapy bunker were simulated using the MCNPX Monte Carlo code. Different commercially available concretes were used in photoneutron calculations for the simulated bunker. RESULTS: Higher neutron doses of the water phantom were seen for barytes and galena concretes, while there was no significant (less than 1%) difference between the neutron dose of the phantom for all other concretes. Also, the neutron fluence at the inner and outer maze entrance varied up to 36% depending on the concretes' atomic compositions. CONCLUSION: It can be concluded that application of high-density concretes in order to use limited space or for other purposes may cause higher neutron doses in the maze entrance door and consequently may impose stricter requirements for neutron shielding of maze entrance doors. More... »

PAGES

162-166

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11604-011-0030-y

DOI

http://dx.doi.org/10.1007/s11604-011-0030-y

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1023543561

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/22180187


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