Published 1976 | Version v1
Report Open

Time resolved optical detection of coherent spin motion for organic radical ion pairs in solution

Creators

Description

The evolution of the singlet character of correlated ion radical pairs, prepared by high energy impact in alkane solutions, is monitored by nanosecond time resolved solute recombination fluorescence. Results obtained in the presence and absence of magnetic fields (B<=4kG) show evidence for damped periodic modulations (ω approximately 10MHz) of fluorescence intensity; they are explained in terms of hyperfine interaction induced coherent singlet-triplet mixing, and of field dependent spin-lattice relaxation

Availability note (English)

MF available from INIS under the Report Number.

Abstract (French)

L'evolution du caractere singulet de paires ion-radicaux, creees dans des solutions alcanes par impact a haute energie, est etudiee par le biais de l'analyse de la fluorescence de recombinaison d'un solute, resolue dans le temps (domaine de la nanoseconde). Les resultats obtenus en presence et en l'absence de champ magnetique (B<=4kG) revelent une modulation periodique amortie (ω environ egal a 10MHz) de l'intensite de fluorescence; ils sont interpretes dans le cadre d'un modele stipulant un melange coherent singulet-triplet induit par les interactions hyperfines et une relaxation spin-reseau dependant du champ

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Additional details

Publishing Information

Imprint Pagination
11 p.
Report number
CRN-CNPA--76-4

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
7269607
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ALKANES; ELECTRON SPIN RESONANCE; ION PAIRS; RADIOLUMINESCENCE; RECOMBINATION; SCINTILLATIONS; SPIN-LATTICE RELAXATION
Descriptors DEC
HYDROCARBONS; LUMINESCENCE; MAGNETIC RESONANCE; ORGANIC COMPOUNDS; RELAXATION; RESONANCE