Sinjavsky, N.Ya., Shpilevoj, A.A.

The peculiarities of double nuclear quadrupole resonance registration for the nitrogen in explosives are considered. The possibility of increase of the sensitivity by calculation of the factors that influence on the spin system contact efficacy in the static magnetic fields is demonstrated. This means allow observe the 14N signals with frequency less then 1 MHz at the room temperature. Method can be use for the control of baggage, personal load and post.