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. 2016 Sep 5;121(9):8228–8236. doi: 10.1002/2016JA022547

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©2016. The Authors.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Measured transmission of 5.486 MeV alphas from an Am²⁴¹ source through the LENI MCP collimator as a function of incident beam angle θ, where θ = 0° corresponds to the boresight direction.