LONGITUDINAL NUCLEAR SPIN-SPIN RELAXATION,
Abstract
A theoretical and experimental study is made of the nuclear magnetization which appears after a sudden unidirectional step magnetic field is applied non-adiabatically to an ordered spin system prepared by the process of adiabatic demagnetization. The magnetization exhibits damped oscillation about a non-vanishing equilibrium value. The oscillation frequencies correspond to the fundamental and harmonic components of Larmor frequency. The oscillations arise as the internally ordered dipole-dipole interaction energy exchanges with the suddenly imposed Zeeman energy reservoir. A density matrix calculation carried to second order in time dependent perturbation theory, combined with a gaussian decay model, accounts for the observed oscillations within times comparable to the decay time. Fluorine nuclei in single CaF2 crystals are studied for various crystal orientations with respect to the applied step field. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0424805
Entities
People
- E. L. Hahn
- R. L. Strombotne
Organizations
- University of California, Berkeley