Nuclear electromagnetic resonance spectroscopy

Abstract

An argument is made for the existence of nuclear electromagnetic resonance (NER) between the interaction Hamiltonian due to the conjugate product π of electric fields of a powerful pump laser and a new concept of nuclear spin polarizability, and a resonating electromagnetic probe field in the appropriate frequency range. NER is mediated theoretically by the interaction of π with an axial vector quantity identified as nuclear spin polarizability, α″_s. The latter is defined through off-diagonal matrix elements of nuclear transition electric dipole moments, between states of different parity, and the perturbation Hamiltonian, -π · α″_s, provides the nucleus with net spin, analogously with the interaction of nuclear spin, I , external static magnetic flux density B , the basis of NMR spectroscopy. This analogy is based on the identical parity and motion reversal symmetries of π and B ; and I and α″_s.

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Notes on contributors

M.W. Evans

1990/1991: Swiss N.S.F. Senior Fellow and Guest of the University of Zurich, Institute of Physical Chemistry, Winterthurerstraße 190, CH-8057 Zurich, Switzerland.