Analysis of influence of spin relaxation on form of nuclear magnetic resonance spectra in liquids with radio frequency pumping

Journal Article · Fri Jan 01 00:00:00 EST 1988 · Theor. Exp. Chem. (Engl. Transl.); (United States)

OSTI ID:6442004

Shokhirev, N V; Salikhov, K M

For a model system of two nonequivalent nuclei with spin 1/2, the NMR spectrum of one of the nuclei has been calculated under conditions of pumping of the second spin, and a study has been made of the spectral transformation upon changing times of transverse and longitudinal relaxation of both spins. It has been established that the form of the spectrum undergoes qualitative changes. An increase in the rate of transverse relaxation not only broadens the observed lines, but simultaneously changes the character of motion of the spins in the pumping field: With increasing relaxation rate, the motion is converted from coherent motion (nutation) to incoherent motion (transitions between levels, saturation effect). Transformations of the spectrum are related specifically to these changes.

• OSTI ID: 6442004
• Journal Information: Theor. Exp. Chem. (Engl. Transl.); (United States), Vol. 23:4; Other Information: Translated from Teoret. Eksper. Khimiya; 23: No. 4, 436-443(Jul-Aug 1987)
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
LIQUIDS
NMR SPECTRA
NUCLEI
SPIN-SPIN RELAXATION
COUPLING CONSTANTS
EXCITATION
HAMILTONIANS
J-J COUPLING
LINE BROADENING
LINE NARROWING
LINE WIDTHS
MULTIPLETS
NUCLEAR MAGNETIC RESONANCE
RADIOWAVE RADIATION
RELAXATION TIME
ZEEMAN EFFECT
COUPLING
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
FLUIDS
INTERMEDIATE COUPLING
MAGNETIC RESONANCE
MATHEMATICAL OPERATORS
QUANTUM OPERATORS
RADIATIONS
RELAXATION
RESONANCE
SPECTRA
656002* - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)