China Wholesale photoelectric effect Factory – LADP-1A Experimental System of CW NMR – Advanced Model – Labor
China Wholesale photoelectric effect Factory – LADP-1A Experimental System of CW NMR – Advanced Model – Labor Detail:
Description
Optional part:Frequency meter, self prepared part oscilloscope
This experimental system of continuous-wave nuclear magnetic resonance (CW-NMR) consists of a high homogeneity magnet and a main machine unit. A permanent magnet is used to provide a primary magnetic field superimposed by an adjustable electromagnetic field, generated by a pair of coils, to allow a fine adjustment to the total magnetic field and to compensate magnetic field fluctuations caused by temperature variations.
Because only small magnetizing current is needed for relatively low electromagnetic field, the heating problem of the system is minimized. Thus, the system can be operated continuously for several hours. It is an ideal experimental instrument for advanced physics laboratories.
Experiment
1. To observe the nuclear magnetic resonance (NMR) phenomenon of hydrogen nuclei in water and compare the influence of paramagnetic ions;
2. To measure the parameters of hydrogen nuclei and fluorine nuclei, such as spin magnetic ratio, Lande g factor, etc.
Specifications
|
Description |
Specification |
| Measured nucleus | H and F |
| SNR | > 46 dB (H-nuclei) |
| Oscillator frequency | 17 MHz to 23 MHz, continuously adjustable |
| Area of magnet pole | Diameter: 100 mm; spacing: 20 mm |
| NMR signal amplitude (peak to peak) | > 2 V (H-nuclei); > 200 mV (F-nuclei) |
| Homogeneity of magnetic field | better than 8 ppm |
| Adjustment range of electromagnetic field | 60 Gauss |
| Number of coda waves | > 15 |
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