. "" . . "The surface called \"surface\" means the lower boundary of the atmosphere. \"Content\" indicates a quantity per unit area. \"Radioactivity\" means the number of radioactive decays of a material per second. \"Sb\" means the element \"antimony\" and \"128Sb\" is the isotope \"antimony-128\" with a half-life of 3.75e-01 days."@en . "SDN:P07::3ULRAZF7" . "accepted"@en . "surface_radioactivity_content_of_128Sb"@en . . "1" . "SDN:P07::3ULRAZF7" . . "false" . . "SDN:P07::3ULRAZF7" . "2018-02-12 16:53:18.0" . . "2018-02-12 16:53:18.0" . "1" .