Alpha Decay Posted on 1st November 201516th July 2021 by ThePD (The Project Definition) Alpha Decay is a type of radioactive decay which produces an alpha particle or helium nucleus. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Technology and tagged radiation, technology. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.