| 摘要 |
PURPOSE:To improve the resolving power without lowering for an SN ratio, by using a function of an odd number degree of the third degree or more making the central part of sample of the starting point as a gradient of a magnetic field applying on the static magnetic field repeatedly. CONSTITUTION:Driving pulse is generated at a prescribed timing from an energizing pulse generation circuit 7 by a timing circuit 10 and a switching circuit 9 is brought down for the A side synchronizing with it and then, said pulse is irradiated on the sample in a sample tube 1 and also, a gradient of a magnetic field is sloped by turning a power source 6 on in the same timing. Further, said gradient is made zero by the circuit 10 by turning the source 6 off simultaneously with finishing of the irradiation and also, the circuit 9 is brought down for the B side and then, observation is carried out by operating an observation circuit 8. Here, the gradient of the magnetic field is turned into a function of the third degree making the central part of the sample of the starting point by setting up winding numbers of coils 5a, 5b, 5c, 5d suitably. Hereby, width of a zero part of the gradient of the magnetic field is extended and an SN ratio can be improved. |
