[Sneap] Caesium Sputter Source and possible contamination from Ti hydride

[Chris Purcell]

Hi Guys
Our SNICS Caesium sputter ion source is mainly used for C-14 Measurements. 

However, occasionally we use Ti-hydride targets for Proton beams.
 When we then go immediately back to measuring C-14 targets ( without 
opening the source for cleaning etc) and we appear to have stability 
problems etc.
Are there issues with possible contamination of the Caesium or other 
reasons that people have experienced?
i.e. is there evidence against using Ti-hydride on a sputter source used 
for C-14 AMS mainly ?

Thanks
Chris

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