Effectiveness of boron-loaded additives in shielding against scattered accelerator radiation (source link)a pdf is also available at the link.
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Borotron from Quadrant Engineering Plastic Products is a high-density polyethylene (HDPE) formulation with 5% elemental boron that provides enhanced neutron shielding. Borated HDPE (the combination of boron within a matrix of HDPE, a naturally hydrogen-rich material) is an ideal product for medical and industrial neutron shielding applications. Borotron is a light-weight, cost-effective, and easily fabricated solution for a wide variety of neutron shielding needs.