Chinese Journal of Magnetic Resonance ›› 1996, Vol. 13 ›› Issue (4): 311-320.

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THE RESPONSES OF THREE ENERGY LEVELS SPIN SYSTEM WITH SMALL ENERGY LEVEL SEPARATION TO PULSES

Xia Youlin1,2, HU Hongbin2, Yang Baolian2, Li Liyun2, Ye Chaohui2   

  1. 1. Department of Biology, University of Sciences and Technology of China, Hefei 230026;
    2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics, The China
  • Received:1995-11-16 Revised:1996-01-18 Published:1996-08-05 Online:2018-01-17

Abstract: Responses to 1-2 pulses for NQR spin system of I=1 with small energy level separation are examined with fictitious spin -1/2 operator formalism.Because the interaction of nuclear spin and radio frequency field in the framework of nuclear quadrupolar interaction is time dependent, time evolutions of density operator are calculated with Dyson time order operator.

Key words: NQR, Responses to pulses, Dyson time-order operator