Good afternoon Stephen
For 89Y (transmitter frequency 24.5013454) on a 5 mm broadband probe on a
"500" magnet, I use a 3 M solution of Y(NO3)3.6H2O and I get a reasonable
signal from 4 scans (transients) with d1 = 720 seconds with pw = 18 us at
150 W. I've not measured the T1 of this sample but 720 seconds seemed a
reasonable figure based on the information in Brevard & Granger's book that
reads "*T1 typical value (s): > 50*"). If you're struggling to find a
signal from a multi-molar solution, set a wide sweep width to start with,
~1000 ppm.
Kind regards,
Craig.
On Thu, 31 Aug 2023 at 12:58, Clemens Anklin via groups.io <clemens.anklin uker.com_at_groups.io> wrote:
> Hi Stephen
>
> make sure you are in the right spot. Multiply your exact TMS frequency in
> MHz (6 decimals) with 0.04900 198 (source: doi:10.1351/pac200880010059)
> That should get you very close to the Y89 frequency.
>
> Clemens
>
> On 8/30/2023 10:38 PM, Stephen M Spain wrote:
>
> Hi,
> One of the PI's wants to measure Y89 on our 500 MHz Varian VNMRS
> spectrometer. I found an ancient 10 mm low frequency probe that can do 15
> to 50 MHz in one our cabinets that I'd never used. I got the probe to tune
> to the 24 MHz needed for Y89 via mtune but can't observe anything for
> either the 200 mM or 1 M yttrium nitrate solutions.
> Since I've never done anything this low of a frequency before is there
> anything besides the quarter wavelength cable that needs to be changed or
> adjusted on a Varian VNMRS? I saw in the probe manual that a switch needed
> to be flipped on the pre-amp but I assume that is for an early 1990's
> console.
> The probe is probably in need of service since it was here decades before
> I was, but any suggestions would be greatly appreciated.
>
> thanks,
> Stephen
>
>
>
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#495): https://urldefense.com/v3/__https://ammrl.groups.=
io/g/main/message/495__;!!PvDODwlR4mBZyAb0!TgDWK-tBbKjrw52jqzYwxslb-JUDV9NL=
kUZcaZIcQo7Ws18zdDEshISagnnytxF9lPHAo2wfGzLl90-_9vGlAg$
Mute This Topic: https://urldefense.com/v3/__https://groups.io/mt/101067099=
/7559972__;!!PvDODwlR4mBZyAb0!TgDWK-tBbKjrw52jqzYwxslb-JUDV9NLkUZcaZIcQo7Ws=
18zdDEshISagnnytxF9lPHAo2wfGzLl909Uu-oD-Q$
Group Owner: main+owner_at_ammrl.groups.io
-=-=-=-=-=-=-=-=-=-=-=-
Received on Thu Aug 31 2023 - 05:29:29 MST