Nuclear quadrupole resonance echoes from hexamethylenetetramine |
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| Institution: | 1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, PR China;2. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China;1. Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China;2. Shanghai Electro-Mechanical Engineering Institute, Shanghai, 201109, China;3. Key Laboratory of Specially Functional Polymeric Materials and Related Technology, East China University of Science and Technology, Shanghai, 200237, China;1. AGH University of Science and Technology, Academic Centre for Materials and Nanotechnology (ACMiN), A. Mickiewicza Av. 30, 30-059 Cracow, Poland;2. Applications Laboratory-NETZSCH-Gerätebau GmbH, Germany;3. Netzsch Instrumenty Sp. z o.o., Crakow, Poland;4. AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta St. 23, 30-059 Cracow, Poland;1. Faculty of Technology, Fibre and Particle Engineering Research Unit, PO Box 4300, 90014 University of Oulu, Oulu, Finland;2. Department of Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium |
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| Abstract: | We investigated the echo phenomenon of nuclear quadrupole resonance (NQR) from hexamethylenetetramine (HMT). We detected the pure NQR echo signal of HMT with a short pulse interval. The intensity of the echo signal increased as the pulse interval time was decreased. We observed that a clean echo signal was generated even when the pulse interval was shorter than the decay time constant T2*. Since the short interval time gives a strong echo, our result insists that shorter interval time is preferred for the NQR detection. |
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