For MIR, you also need to weigh your options.
If you want to use anomalous signal for SIRAS/MIRAS, you may want to be above the most prominent or at least a useful edge of your HA.
On the other hand, being above an HA edge increases you chance of serious radiation damage. Sometimes you may need to back-soak.
For light atoms, higher energy generally means less absorption.
All depends on many details which you do not provide.
BR
-----Original Message-----
From: CCP4 bulletin board [mailto:[log in to unmask]] On Behalf Of Theresa H. Hsu
Sent: Monday, February 13, 2012 1:02 PM
To: [log in to unmask]
Subject: [ccp4bb] Choice of wavelength
Hi all.
When collecting data, is there a specific wavelength to be chosen at synchrotron source? Does it make difference between 0.9 and 1.5 A, for example? I know it is important for SAD/MAD but how about MIR?
Thank you.
Theresa
|