Fujita Utilizes Low Activation Concrete for Construction of PET Imaging Facility.Tokyo, Japan, Feb 27, 2007 - (JCN JCN Japan Corporate News JCN Journal of Cognitive Neuroscience JCN Journal of Cardiovascular Nursing JCN Journal of Christian Nursing JCN Job Control Number JCN Journal of Child Neurology JCN joint communications network (US DoD) ) - Fujita Corporation announced its first practical application of their low activation concrete as a radiation shielding Radiation shielding Physical barriers designed to provide protection from the effects of ionizing radiation; also, the technology of providing such protection. material. The concrete was used as shielding material for a small cyclotron cyclotron: see particle accelerator. cyclotron Particle accelerator that accelerates charged atomic or subatomic particles in a constant magnetic field. in a PET imaging facility that is now under construction in Nagano City. The neutron shielding effect The shielding effect describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell. It is also referred to as the screening effect or Atomic shielding. of this concrete is over 1.7 times that of conventional low activation concrete and is also non-shrinkable, making it highly resistant to cracking. The higher neutron shielding effect allows for thinner concrete shielding that, as a result, creates more usable space within the PET facility. Copyright [c] 2007 Japan Corporate News Network. All rights reserved. |
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