114 



No, 



24 



sodium-24 I. 39mev 



Mg 



24 



12 



Co' 



60 

 J 27~ 



cobalt-60 



Ni 



60_ 

 '28 



15 hrs 



K 



42 (18%) (82%) 



19 



potossium-42 



y 1.37 



Co 



42 

 20 



/92.0 



,yl.53 



12.5 hrs 



£3.6 



y 2.76 



. 59 (46%) (54%) 



Fe„ 1 1 4 5 days 



/30.46 



yl 29 ^ rl.10 



(43%) ^ (57%) 



Sr 



y 



90_ 

 38 



90 



28yrs 32 



0.54 15" 



0.306 



39 

 5.25yrs 



7 I . I7mev 



Zr 



yl. 33mev 



9o_ 

 40 



phosphorus-32 



j8 2.26 



.32 



14 2 days 



0l.7lmev 



carbon-14 



.14 



6~ 



4 1 



C 



N 



H 

 He 



— 5568yrs 



0O.I55mev 



3 i 



12.26 y rs 



00.0 1 8 me v 



tritium 



lod ine-131 



(3%) (9%) (87%) 



00.33 



/30.6lmev 



(1%) 



y0.64 <wy0.36 <-yO 28 

 ri(80%)r^-(5%) 



00.87 



■8 04 days 



70.08 

 70.08 



54 v stable 



Figure 5-7. Decay Schemes for Several Radioactive Isotopes Used in Biological 

 Research, and in Medical Diagnosis and Therapy. 



