SUMMARY OF AVAILABLE RADIOISOTOPE 

 PREPARATIONS 



The following list was compiled from the 1955 Catalog and Price List of the Oak 

 Ridge National Laboratory (operated for the United States Government by Carbide 

 and Carbon Chemicals Company). The costs are unofficial and are included only to 

 mdicate the scale of experiments that are feasible, as explained in Chap. 6 Differ- 

 ences between this listing and that in Chap. 6 result from additional information 

 made available since Chap. 6 was set in type. 



Element 



Antimony 



Argon 

 Arsenic 



Barium 



Cat. No. 



Sb- 122-1 

 Sb- 124-1 

 Sb-124-P 

 Sb- 125-1 



Sb-125-P 



A-37-P 



AS-73-74-P 



As-76-I 



As-77-I 



Ba- 131-1 



Specific Ac- 

 tivity, mc/g 



210 

 20 

 >500 

 CF 



CF 



CF 

 CF 

 440 



CF 



0.015 



Cost 



$15/210 mc 

 $45/20 mc 

 $3/mc 

 $45/0.18 mc 



$100/mc 



$10/mc 

 $200/mc As'3 

 $15/33 mc 



$15/5.7 mc 



$45/0.35 mc 



446 



Radiochemical 

 Contam,inants 



8 mc Sbi24 (60 days) 

 260 mcSbi22 (2.8 days) 



4100 mc Sni2i (27.5 hr) 

 12 mc Sn'2i'« (>400 



days) 

 5.5mcSni23 (136 days) 

 1.8 mcSn"3 (112 days) 

 1.8mcln"3« (104 min) 

 0.59 mc Sn"^'« (14 



days) 

 0.18 mc Sni25 (9.4 



days) 

 0.18 mc Tei25m daugh- 

 ter (58 days) 

 0.16 mc Sn'iS'^ (~250 



days) 

 Tei25'« daughter (58 

 days) 



Trace Sb'=2 (2.8 days) 

 Trace Sb^^^ (60 days) 

 89 mc Ge" (11.4 days) 

 5.7 mc Ge" (12 hr) 

 67 mc Bai35'« (28.7 hr) 

 8.3 mc Bai33'« (38.8 hr) 

 8.3 mc Bai33 (--9.5 yr) 

 0.35 mc Cs'" daughter 



(9.6 days) 

 Trace Bai*« (12.8 days) 



