Activation Processes in Medical Linear …

Activation Pocesses in Medical Linear Accelerators Activation Processes in Medical Linear Accelerators and Spatial Distribution of Activation Products Helmut W Fischer1,3, Ben E Tabot1,2 and Bj rn Poppe2 1 University of Bremen, Dept. of Physics, 28359 Bremen, Germany 2 University of Oldenburg, Institute of Physics, 26111 Oldenburg, Germany E-mail: Abstract Activation products have been identified by in situ gamma spectroscopy at the isocenter of a Medical Linear accelerators shortly after termination of a high energy photon beam irradiation with 15 x 15 cm field size. Spectra have been recorded either with open or with closed collimator. Whilst some Activation products disappear from the spectrum with closed collimator or exhibit reduced count rates, others remain with identical intensity.

Activation Pocesses in Medical Linear Accelerators Figure 1. Experimental setup for the in situ gamma spectroscopy and dose rate measurements. The photo shows the gamma detector with its cryostat on the top of the treatment couch.

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  Linear, Medical, Processes, Accelerator, Activation, Activation processes in medical linear

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