Patent ID: 7411392

Claim:
A system for probing a specimen to detect a material comprising: a first transmitter, said first transmitter transmitting a first signal, said first signal exciting said specimen at a nuclear quadrupole resonant frequency of said material; said exciting of said specimen at said nuclear quadrupole resonant frequency of said material causing a change in a property of said material; a second transmitter said second transmitter transmitting a second signal, said second signal being directed toward said specimen; said specimen interacting with said second signal and producing a third signal, said third signal being a portion of the energy of said second signal having a change in a signal property resulting from said change in said property of said material; a receiver, said receiver receiving said third signal from said specimen; and a processor, said processor detecting said change in said signal property of said third signal, said change in said signal property of said third signal indicating said specimen comprises said material.