APPARATUS FOR AND METHOD OF NUCLEAR RESONANCE TESTING

摘要

Apparatus for Nuclear Quadrupole Resonance testing a sample comprises: means (102) for applying excitation to the sample to excite NQR resonance, the excitation comprising at least one excitation pulse, the or each pulse covering a selected excitation frequency range, for the or each pulse the phase of the excitation varying generally non-linearly with the excitation frequency over the selected range; and means (106) for detecting the NQR response signal.