FIELD: technology for measuring time of nuclear spin-spin relaxation.
SUBSTANCE: research subject sample, positioned in indicator of radio-spectrometer, is affected by first group of two pulses of high-frequency magnetic field, separated by time interval, frequency of magnetic field in pulses is the same and lies within area of predetermined nucleus resonance frequency for research subject, after second pulse of first group, value of detected and direct-current-amplified nuclear spin echo is registered, after each first group of pulses research subject is additionally affected by second group of two pulses of high-frequency magnetic field, wherein field oscillation phase in first pulse of second group is different for 180° from field oscillation phase in first pulse of first group, while remaining parameters of second group pulses match appropriate parameters of first group pulses, after second pulse of second group value of detected and direct-current-amplified nuclear spin echo signal are registered, difference of values is calculated for echo signals in first and second groups and on basis of falling speed of value of resulting echo signals, received at gradually increasing interval between pulses in both groups, relaxation time is determined.
EFFECT: increased precision of measuring time of spin-spin relaxation of nucleuses.
2 cl, 1 dwg
