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Coherent manipulation of non-thermal spin order in optical nuclear polarization experiments

Buntkowsky, Gerd ; Ivanov, Konstantin L. ; Zimmermann, Herbert ; Vieth, Hans-Martin (2022):
Coherent manipulation of non-thermal spin order in optical nuclear polarization experiments. (Publisher's Version)
In: The Journal of Chemical Physics, 146 (11), AIP Publishing, ISSN 0021-9606, e-ISSN 1089-7690,
DOI: 10.26083/tuprints-00019736,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Coherent manipulation of non-thermal spin order in optical nuclear polarization experiments
Language: English
Abstract:

Time resolved measurements of Optical Nuclear Polarization (ONP) have been performed on hyperpolarized triplet states in molecular crystals created by light excitation. Transfer of the initial electron polarization to nuclear spins has been studied in the presence of radiofrequency excitation; the experiments have been performed with different pulse sequences using different doped molecular systems. The experimental results clearly demonstrate the dominant role of coherent mechanisms of spin order transfer, which manifest themselves in well pronounced oscillations. These oscillations are of two types, precessions and nutations, having characteristic frequencies, which are the same for the different molecular systems and the pulse sequences applied. Hence, precessions and nutations constitute a general feature of polarization transfer in ONP experiments. In general, coherent manipulation of spin order transfer creates a powerful resource for improving the performance of the ONP method, which paves the way to strong signal enhancement in nuclear magnetic resonance.

Journal or Publication Title: The Journal of Chemical Physics
Volume of the journal: 146
Issue Number: 11
Publisher: AIP Publishing
Collation: 13 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Divisions: 07 Department of Chemistry > Physical Chemistry
Date Deposited: 11 Jan 2022 14:46
Last Modified: 11 Jan 2022 14:46
DOI: 10.26083/tuprints-00019736
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-197363
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19736
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