Selective excitation of homogeneous spectral lines

TL;DR

This paper introduces a method for selectively exciting narrow spectral responses within homogeneously broadened lines, enabling enhanced detection and analysis in NMR spectroscopy.

Contribution

It presents a novel echo technique and formalism for selective excitation of spectral lines narrower than the original broad lines.

Findings

Successful experimental demonstrations in NMR spectroscopy.

Theoretical formalism explaining the selective excitation phenomenon.

Potential applications in high-resolution spectroscopy.

Abstract

It is possible, for homogeneously broadened lines, to excite selectively the response signals, which are orders of magnitude narrower than the original lines. The new type of echo, which allows detecting such signals, and the formalism, useful for understanding the phenomenon, as well as the experimental examples from NMR spectroscopy are presented.