<prompt> All are pure beta emitters except:Yttrium-90CobaltStrontium-90Samarium-153  <response>: D i.e. Samarium-153 Pure beta 63 emitters radionuclides are phosphorus-32, strontium-90, Yttrium-90 and tritium-30Q. Whereas Samarium-153 Rhenium-186 are mixed 3 and y emittersQ. Systemic radionuclide therapy for bone metastases and pain include 89Sr, 32P, 186Rhand 153SaQ. Phosphorus-32 the first agent to be used is now rarely used b o risk of myelo suppression, pancytopenia acute leukemia. Strontium-89 decays by 3 emission to yttrium-89 with a half life of 50.6 days 13 energy 1.46MeV. It is quickly taken up by mineral material of bone bo chemical similarity to calcium and bo extremely little y radiation patient is not a radiation hazard to family members hospital staff. Samarium-153 is a aificial radionuclide that emits R paicles of 0.81 MeV 20, 0.71 Mev 30, 0.64 MeV 50 and gamma photons of 103 KeV 28. It has a sho half life of 46.3 hours and is chelated with EDTMP to produce bone seaking complex. Rhenium-186 emits paicles of 1.07 MeV and a 137 KeV gamma rays. It has a sho half life of 3.8 days and is chelated with HEDP to produce bone seeking complex. 