Influence of molecular motions on NQR echoes

N. A. Sergeev, A. M. Panich, M. Olszewski

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The influence of thermal molecular motions on spin echo decay in pure nuclear quadrupole resonance (NQR) is considered. Our calculations show that the Hahn echo decay is caused by dipole-dipole interaction of the nuclear spins and is strongly affected by molecular mobility that can lead to the shortening of the echo decay with increased temperature. Slow molecular motion yields an exponential τ3 time dependence, while fast motion yields an exponential decay. The outlined theory allows us to explain an unusual shortening of the 35Cl NQR echo decay on heating in thiourea-C 2Cl6 inclusion compound.

Original languageEnglish
Pages (from-to)41-57
Number of pages17
JournalApplied Magnetic Resonance
Issue number1-2
StatePublished - 1 Jan 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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