radioactivity_concentration_of_225Ra_in_air

"Radioactivity" means the number of radioactive decays of a material per second. "Radioactivity concentration" means radioactivity per unit volume of the medium. "Ra" means the element "radium" and "225Ra" is the isotope "radium-225" with a half-life of 1.48e+01 days.

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Proposls with this term version:

Proposal: Heiko Klein [Standard_name proposal for volcanic ash ]

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