title: A simple formula for estimation of surface dose from photons emitted from a finite cloud.
mesh_terms: D000398:Air Pollution, Radioactive; D004601:Elementary Particles; D005720:Gamma Rays; D011829:Radiation Dosage; D011868:Radioisotopes; D012542:Scattering, Radiation
chemical_list: D011868:Radioisotopes