title: Dosage-depth relationship for a collimated  90 Sr- 90 Y beam.
mesh_terms: D000042:Absorption; D004583:Electrons; D009678:Nuclear Energy; D011095:Polyethylenes; D011482:Protective Devices; D011835:Radiation Protection; D011874:Radiometry; D013057:Spectrum Analysis; D013325:Strontium Isotopes; D015020:Yttrium Isotopes
chemical_list: D011095:Polyethylenes; D013325:Strontium Isotopes; D015020:Yttrium Isotopes