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Radiation Protection Dosimetry Advance Access published online on June 17, 2009
Radiation Protection Dosimetry, doi:10.1093/rpd/ncp101
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Published by Oxford University Press 2009. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

INVESTIGATION OF THE NEUTRON CONTRIBUTION IN THE 6 MeV TO 7 MeV HIGH ENERGY PHOTON REFERENCE FIELD

S. Röttger*, A. Heiske and R. Nolte

Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D-38116 Braunschweig, Germany

* Corresponding author: Stefan.Roettger{at}PTB.de

Received February 13, 2009, amended February 13, 2009, accepted February 13, 2009

In order to provide reference fields for the ionising radiation, PTB operates the ion accelerator facility. Referring to high energy photons, reference fields according to International Organization for Standardization 4037 series are produced. The neutron component of the 6–7 MeV photon field (R-F), which is produced by bombarding a CaF2 target with protons with an energy of Ep = 2.7 MeV, is investigated in detail for the first time. Two discriminative methods are used to determine the yield for neutrons produced in the CaF2 target.


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