DEVICE FOR OBTAINING SIGNAL CONTAINING INFORMATION ON SPIN-SPIN RELAXATION

PURPOSE:To make it possible to obtain a signal contg. plural sets of information on spin-spin relaxation time only by change-over of a 90 deg. pulse and an inclined magnetic field by exciting the nuclear spin on the selecting surface of an object to be measured, defacing the nuclear spin, inverting the direction of the inclined magnetic field and reading out the generated spin echo signal. CONSTITUTION:A control part 11 is connected through a part 12 for generating the signal for an inclined magnetic field in a direction (x), a part 13 for generating the signal for an inclined magnetic field in a direction (y), a part 14 for generating the signal for an inclined magmetic field in a direction (z), a part 15 for generating the signal for a 90 deg. pulse, an upper bus 16 and a lower bus 17. An address is assigned by the data on the busses 16, 17 in the part 15 and an ROM28 is read out. The read-out data is converted to an analog signal by a DA converter 29. A reference high frequency signal from an oscillator 32 is modulated by an AM modulator 31 from said analog signal. The modulated output is passed through a gate 33, is further amplified by an amplifier 34 and is supplied to a coil 7. Said output is amplified by the gate 33 and is supplied to the coil 7. The gate 33 prevents leakage of the high frequency signal from the oscillator 32 to the amplifier 34 when the output from the converter 29 is zero. The opening and closing of the gate 33 are accomplished by the part 11.