SUMMARY OF AVAILABLE RADIOISOTOPE PREPARATIONS 



451 



Element 



Thallium 

 Tin 



Tungsten 



Cat. No. 



T1-204-I 



T1-204-P 



Sn-113-I 



Specific Ac- 

 tivity, mc/g 



1.4 

 >50 

 0.14 



Cost 



$50/33 mc 



$5 /mo 

 $45/1.8 mc 



Sn-113-P >1 



W- 185-1 



6.6 



$35 /mc 



$45/9.5 mc 



W-185-P >100 

 W- 187-1 420 



$4/mc 

 $15/40 mc 



Radiochemical 

 Contaminants 



Trace C^^ (5568 yr) 



4100mcSn>2i (27.5 hr) 

 12 mc Sn'2i'» (>400 



days) 

 5.5mcSni23 (136 days) 

 1.8 mc Iii'ism daughter 



(104 mill) 

 0.59 mc Sn""-" (14 



days) 

 0.18 mc Sni" (9.4 



days) 

 0.18 mc Sb'25 (2.7 yr) 

 0.18 mc Tei"'« (58 



days) 

 0.16 mc Snii9^ (~250 



days) 

 Inii3,« daughter (104 



min) 

 600 mc Wi" (24.1 hr) 

 0.12 mc \V'8i (140 



days) 

 Trace W^^^ (65 days) 

 Trace Rei«8 (16.9 hr) 



0.17 mc W'85 (73.2 



days) 

 0.002 mc \Vi8' (140 



days) 

 Trace W'^^ (65 days) 

 Trace Re'^^ (16.9 hr) 



