The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 1979
Filed:
Nov. 28, 1977
Richard R Ernst, Winterthur, CH;
Varian Associates, Inc., Palo Alto, CA (US);
Abstract
Selected orders of multiple quantum transitions may be detected by preparing a statistical non-equilibrium state of an assembly of gyromagnetic resonators of selected phase with respect to a subsequent mixing pulse. After an evolution period, t.sub.1, a 90.degree. mixing pulse is applied and the free induction decay is sampled as a function of time, t.sub.2. The signal functions S.sub.i (t.sub.1, t.sub.2, .phi..sub.i) is developed for systematically varied values of t.sub.1 and specially selected values of .phi..sub.i. Linear combinations of the signal functions S.sub.i yield, after Fourier transformation a two dimensional spectrum of multiple quantum transitions limited by the choice of phase and linear combination. In another embodiment, a magnetic gradient pulse is applied during the evolution period and resulting multiple quantum transitions yield spectral peaks of width dependent upon the order of such transitions. In particular, all spectral peaks may be removed from resulting spectra save only zero order transitions.