928 



THE BELL SYSTEM TECHNICAL JOURNAL, OCTOBER 1951 



T = 800* K V = 2400 



6.5 MINUTES 



V = 2800 ^ L=50/4A 



2/5 SECOND 



T= 940''K V = 



5 MINUTES 



V = 2650 _^ L= 50 aA 



24 SECOND 



T = 1045'*K V = 



5 MINUTES 



V= 2800 ^ L= 50 ^A 



2/5 SECOND 



T=1130°K V=VARIED 

 5 MINUTES 



V = 2850^ L= 50 /^A 



2/5 SECOND 



T = 1210° K V = 



5 MINUTES 



V= 3250 ^ L= 50 /iA 



2/5 SECOND 



T = 1275°K V = 



6 MINUTES 



V= 4400 ^ L= 50 flA 



2/5 SECOND 



Fig. 9— Migration of Ba on W from 800 to 1045*'K. Evaporation of Ba on W from 1130 

 to 127! 



JS^K. 



