I-123 p,2n vs p,5n Purity

[VERNIG.PETER@forum.va.gov]

In response to Mike Grissom I found that there are actually two p,2n
reactions that have been used to make I-123.
 
|TAB|Te-124 [p,2n] I-123  and Xe-124 [p,2n] Cs-123 -> B+ + Xe-123 ->
B+ + I-123
 
The latter indirect method, I think produces purer I-123 because purer
Xe 124 is available.  The earlier direct method was replaced by the
purer p,5n which in turn I think has largely given way to the indirect
p,2n.