Journal ArticleDOI
Free Magnetic Induction in Nuclear Quadrupole Resonance
M. Bloom,E. L. Hahn,B. Herzog +2 more
TLDR
In this paper, the free precession of an ensemble of nuclear quadrupole moments in an axial electric field gradient is studied by the pulsed nuclear induction method, which is analogous to the macroscopic nuclear induction equations of Bloch.Abstract:
The free precession of an ensemble of nuclear quadrupole moments in an axial electric field gradient is studied by the pulsed nuclear induction method. A quantum-mechanical analysis describes the free precession and spin echo signals which result from the application of single and double pulses of radio-frequency field at the condition of zero-field quadrupole resonance. Beat modulation effects exhibited by free precession signals in a small constant external magnetic field are predicted by analysis. An alternative semiclassical description of quadrupole precession is given, which is analogous to the macroscopic nuclear induction equations of Bloch. Theory is verified by observation of free precession signals of chlorine in NaCl${\mathrm{O}}_{3}$.read more
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Book ChapterDOI
Chapter 5 Chlorine, Bromine, and Iodine Solid-State NMR Spectroscopy
TL;DR: The theory related to NMR spectroscopy of half-integer quadrupolar nuclei in powdered samples is briefly summarized, as are the experimental methods for recording such spectra as discussed by the authors.
Journal ArticleDOI
Nuclear quadrupole resonances in compact vapor cells: The crossover between the NMR and the nuclear quadrupole resonance interaction regimes
TL;DR: In this paper, the authors present an experimental study that maps the transformation of nuclear quadrupole resonances (NQRs) from the pure NQRs to the quadrupoles-perturbed Zeeman regime, where the quantization axis changes from being aligned along the axis of the electric-field gradient tensor to beingaligned along the magnetic field.
Journal ArticleDOI
Nuclear quadrupole resonance in the interaction representation
J.C. Pratt,J.C. Pratt +1 more
TL;DR: In this article, the transient pulsed response of an ensemble of nuclei with spin I = 3/2 experiencing electric quadrupole couplings is calculated, both in zero field and in the presence of a weak, applied static field.
Journal ArticleDOI
Absence of orbital currents in superconducting YBa2Cu4O8 using a zeeman-perturbed nuclear-quadrupole-resonance technique.
TL;DR: The magnetic environment of the barium atom in c-axis oriented powder samples of YBa(2)Cu(4)O(8) was investigated in the pseudogap phase at 90 K and no evidence for orbital currents was found.
Journal ArticleDOI
NMR Relaxation Times in Solid White Phosphorus: Diffusion and Rotation
TL;DR: In this article, the nuclear magnetic resonance relaxation times have been measured for solid white phosphorus by spin-echo techniques and the distance between phosphorus atoms in the P4 molecule is found to be 2.24±0.03 A from the value of T1 at the T1 minimum in the β phase.