Cyclotrons2016 - List of Authors (Abbasi Davani, F.)

Paper	Title	Page
MOP22	Simulation of Optimum Thickness and Configuration of 10 MeV Cyclotron Shield	110
	S. Azizpourian, H. Afarideh, M. Afkhami Karaei, M. Mousavinia AUT, Tehran, Iran F. Abbasi Davani Shahid Beheshti University, Tehran, Iran
	Baby Cyclotrons that made in Self-shield type have been employed for use in Medical center for the diagnosis of cancer diseases by positron emission tomography (PET) system. Here in we have done a discussion on gamma and neutron dose rates at a distance of one meter outside of the cyclotron shielding. This shield consist of Lead, polyethylene borated (10% Boron) layers from inside to outside respectively. With increasing the thickness of lead and polyethylene we will see a decrease in the gamma and neutron dose which received by the water phantom at a distance of one meter outside from the surface of the shield of the cyclotron. Note that the gamma and neutron dose at the beginning (without any shielding) was on the order of several thousand μSv per hour that by achieve to a certain amount of thickness of the shield, the dose was reduced to below of the limited level. In this study, the MCNPX Code has been used. In MCNPX Code that used the variance reduction techniques for decreasing relative errors of calculation which was a good method for this case study.
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Paper

Title

Page

Simulation of Optimum Thickness and Configuration of 10 MeV Cyclotron Shield

110

S. Azizpourian, H. Afarideh, M. Afkhami Karaei, M. Mousavinia
AUT, Tehran, Iran
F. Abbasi Davani
Shahid Beheshti University, Tehran, Iran

Baby Cyclotrons that made in Self-shield type have been employed for use in Medical center for the diagnosis of cancer diseases by positron emission tomography (PET) system. Here in we have done a discussion on gamma and neutron dose rates at a distance of one meter outside of the cyclotron shielding. This shield consist of Lead, polyethylene borated (10% Boron) layers from inside to outside respectively. With increasing the thickness of lead and polyethylene we will see a decrease in the gamma and neutron dose which received by the water phantom at a distance of one meter outside from the surface of the shield of the cyclotron. Note that the gamma and neutron dose at the beginning (without any shielding) was on the order of several thousand μSv per hour that by achieve to a certain amount of thickness of the shield, the dose was reduced to below of the limited level. In this study, the MCNPX Code has been used. In MCNPX Code that used the variance reduction techniques for decreasing relative errors of calculation which was a good method for this case study.

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