We have 400 MHz Oxford magnet with no vibration dampening, resting on a =
concrete floor of a single story builiding with no basement. We can see =
what we believe are room vibration effects - peaks 180 out-of-phase =
equally dispaced about a central line of a chloroform sample. They are in =
some cases about half the intensity as the 13C satellites.
While we expect to see some peaks, we are surprised how large they are. =
Will vibrational dampening eliminate these peaks? Does anyone have a =
sense of what is =22good=22 or =22acceptible=22 as far as these vibrational=
peaks are concerned, either with or without dampening? Are there any =
criteria or guidelines for this?
Thanks,
John Thoburn
jthoburn=40scuacc.scu.edu
phone: 408-554-4796
fax: 408-554-7811
Department of Chemistry=20
Santa Clara University
Santa Clara, CA 95053