Hi,
Could you possibly specify “lineshape deterioration” a bit more precisely?
I mean, are we talking about a change from 1 Hz linewidth at half-height to something
like 5-10 Hz (not great, but can easily be induced by e.g. changes in the sample like
bubble formation, product fallout or solvent evaporation) or 200-2000 Hz (making up
numbers, but that’s what a failing cryoshim can easily lead to)?
A failing cryoshim is also one-way only, so lineshape is and stays bad afterwards
and an only rarely be compensated by RT shimming. Your case doesn’t sound like
a cryoshim effect to me…
Best regards
Bert
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Received on Thu Aug 15 2024 - 13:54:06 MST