METHOD, SENSING ELEMENTS AND SYSTEM FOR DETECTION AND/OR ANALYSIS OF COMPOUNDS SIMULTANEOUSLY DISPLAYING NUCLEAR QUADRUPOLE RESONANCE AND NUCLEAR MAGNETIC RESONANCE OR DUAL NUCLEAR QUADRUPOLE RESONANCE

摘要

FIELD: physics, measuring.;SUBSTANCE: method is used for sensing and/or analysis of compounds, simultaneously displaying nuclear quadrupole resonance and nuclear magnetic resonance or dual nuclear quadrupole resonance. Essence lies in the fact, that applied to a group of nuclei with axial spins A, which are capable of exhibiting quadrupole resonance, the first magnetic field H₁, in this case the specified field H₁ has a vibration frequency, equal to the frequency of the quadrupole resonance of the specified group of nuclei with axial spins A. Simultaneously to a group of nuclei with axial spins B is applied, capable of exhibiting magnetic resonance, second and third fields, in this case the specified second magnetic field is magnetic field H₀, which is switched on simultaneously with the first impulse of the specified vibrating magnetic field H₁ and the specified third magnetic field is magnetic field H₂, which has a vibrating frequency inside the magnetic resonance frequency of the specified group of nuclei with axial spins B in the specified magnetic field H₀. The specified second magnetic field H₀ is switched off, when the signal of quadrupole resonance from the specified group of nuclei with axial spin A is at maximum. Discretisation and summation of the detected signals is carried out at the time of switching off the field H₀, synchronously with the pulse train for H₁ field excitation, an alarm is sounded in case of a positive result is detected or detection is going on and/or analysis of the following compound in case if a negative result is detected.;EFFECT: improvement of the signal-to-noise ratio and the guarantee of discretisation of the quadrupole sign of axial spin without the application of any external magnetic field.;94 cl, 12 dwg