Protection characteristic of shielding materials towards radiation of an 11 MeV positron emission tomography cyclotron

Pang Jian; He Xiaozhong; Jing Xiaobing; Ma Chaofan

doi:10.3788/HPLPB20132511.2981

Volume 25 Issue 11

Dec. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(11): 2981-2985

Cai Chuanxiong, Liu Hongxi, Zhang Xiaowei, et al. Influence of powder feeding angle on geometric parameters of laser-clad Fe-based composite coating[J]. High Power Laser and Particle Beams, 2013, 25: 1359-1364. doi: 10.3788/HPLPB20132506.1359

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Pang Jian, He Xiaozhong, Jing Xiaobing, et al. Protection characteristic of shielding materials towards radiation of an 11 MeV positron emission tomography cyclotron[J]. High Power Laser and Particle Beams, 2013, 25: 2981-2985. doi: 10.3788/HPLPB20132511.2981

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Protection characteristic of shielding materials towards radiation of an 11 MeV positron emission tomography cyclotron

doi: 10.3788/HPLPB20132511.2981

1.
Institute of Fluid Physics,CAEP,P.O.Box 919-106,Mianyang 621900,China

Received Date: 2013-03-18
Rev Recd Date: 2013-09-11
Publish Date: 2013-10-28

Abstract

Abstract

An 11 MeV cyclotron used for production of positron emission radionuclide aiming at positron emission tomography (PET) imaging produces a huge quantity of instant neutron and gamma ray radiation. For shielding this kind of accelerator, a self-shielding bunker-like structure is employed, which can be designed with Monte Carlo method. The discrete dual-differential section data are calculated first to obtain the input data for Monte Carlo code, with which the protection characteristics with a single layer and composite structure of various materials are simulated next. The results show that with a single layer, the heavy concrete which has 73.8% iron content brings greatest protection characteristic among all of the materials included in this paper and attenuates the total dose rate about 100 kilo times at the position of 1 m far away from the radiation source with 0 emission angle with thickness of 90 cm. With materials of iron and boracic acid liquor, a particular composite structure can bring the same characteristic with the same thickness and reduce the total density about 20% at least.
- positron emission tomography,
- cyclotron,
- instant radiation,
- dual-differential section,
- shielding materials

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