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Part of the 29 mm family of probes designed for the narrow space of our high-field, 830 MHz NMR magnet.
This large sample MAS probe is made for applications where inherent lack of sensitivity
can be compensated by large sample volume. Maximum sample spinning speed is 10 kHz.
The probe can be tuned to different low-gamma nuclei by switching interchangeable frequency inserts as explained below.
This and other MAS probes (2.0 and 4.0 mm) constructed for this unique narrow bore magnet,
incorporate MAS stators that were custom-designed by Ago Samosan at the Institute of Chemical and Biological Physics in Tallinn, Estonia.
Use this table to select frequency inserts for your nucleus+.
Tuning range for each insert is defined as a frequency range where reflection at resonance is < -35dB with a solids sample.
Note that using solution samples may shift the resonance outside of that range.
Nuclei
|
Tune Insert
(pF) |
Match Insert
(pF) |
Balance
(pF) |
Freq. range
(MHz) |
| 25Mg,
67Zn |
39 |
open++ |
56 |
50.3...52.6 |
| 95Mo,
201Hg,
97Mo,
43Ca |
30 |
open++ |
47 |
54.1...57.2 |
| 14N,
33S |
22 |
open++ |
39 |
59.9...64.4 |
| 17O |
open++ |
open++ |
6.8 |
113 |
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+ Contact Peter Gor'kov to arrange inserts for an isotope not listed in the table.
++ Open indicates not the absence of insert itself but the special insert without a chip.
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