| 摘要 |
PURPOSE:To obtain an inexpensive device by detecting the decoupling of a heavy hydrogen nucleus in a sample and the detection of a heavy hydrogen nuclear resonance signal for magnetic field locking of an external sample on a time-division basis. CONSTITUTION:A resonance frequency signal generated by a resonance frequency source 2 for a carbon nucleus is passed through a gate circuit 6 and amplified 9, and applied to a probe 13 to activate the resonance of the carbon nucleus. Further, the output signal of a decoupling frequency source 3 for a hydrogen nucleus is amplified 10 and applied to the probe 13, thereby decoupling the hydrogen nucleus. The resonance signal of the carbon nucleus obtained by the probe 13 is amplified 15 and detected 18, and its detection signal is Fourier-transformed 21 to obtain the spectrum of the carbon nucleus. The output signal of a magnetic field locking system frequency source 5 for the heavy hydrogen nucleus, on the other hand, is passed through a gate circuit 8, switch 11, probe 13 and amplified 16, detected 19 and further amplified 20, and fed back 14. When the switch 11 is operated, the output signal of the frequency source 4 is applied to the heavy hydrogen nucleus of a measured sample through a gate 7 and the switch 11 to detect the resonance signal of the heavy hydrogen nucleus of the external sample. |
