FIELD: investigation of structure and composition of chemicals, development of radio engineering equipment and systems which use interaction of materials with radio frequency field. SUBSTANCE: method involves application radio frequency pulses to sample with quadruple nuclei, and detection of echo signals. Filling frequency of pulses is equal to resonance frequency ω(i)
Q
for excitation transition. Goal of invention is achieved by additional application of radio frequency pulses with filling frequencies of ω(i)
Q
+Δω(i)
Q
and ω(i)
Q
-Δω(i)
Q
, where Δω(i)
Q
is detuning of resonance frequency of excitation transition within half-width of nuclear quadruple resonance. EFFECT: possibility to excite resonance transitions with wide nuclear quadruple resonance, receive additional information about structure and composition of chemicals, which are hard to investigate using prior art methods. 6 dwg
