"SDN:P07::4ODRBT4L" . "false" . . . "2018-02-12 16:53:18.0" . "\"Radioactivity\" means the number of radioactive decays of a material per second. \"Radioactivity concentration\" means radioactivity per unit volume of the medium. \"Ga\" means the element \"gallium\" and \"73Ga\" is the isotope \"gallium-73\" with a half-life of 2.03e-01 days."@en . "1" . "radioactivity_concentration_of_73Ga_in_air"@en . "SDN:P07::4ODRBT4L" . "" . "1" . "accepted"@en . "SDN:P07::4ODRBT4L" . . . . "2018-02-12 16:53:18.0" . .