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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.
In: The Journal of Chemical Physics, 146 (11)
doi: 10.26083/tuprints-00019736
Artikel, Zweitveröffentlichung, Verlagsversion

Kurzbeschreibung (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.

Typ des Eintrags: Artikel
Erschienen: 2022
Autor(en): Buntkowsky, Gerd ; Ivanov, Konstantin L. ; Zimmermann, Herbert ; Vieth, Hans-Martin
Art des Eintrags: Zweitveröffentlichung
Titel: Coherent manipulation of non-thermal spin order in optical nuclear polarization experiments
Sprache: Englisch
Publikationsjahr: 2022
Verlag: AIP Publishing
Titel der Zeitschrift, Zeitung oder Schriftenreihe: The Journal of Chemical Physics
Jahrgang/Volume einer Zeitschrift: 146
(Heft-)Nummer: 11
Kollation: 13 Seiten
DOI: 10.26083/tuprints-00019736
URL / URN: https://tuprints.ulb.tu-darmstadt.de/19736
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Herkunft: Zweitveröffentlichungsservice
Kurzbeschreibung (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.

Status: Verlagsversion
URN: urn:nbn:de:tuda-tuprints-197363
Sachgruppe der Dewey Dezimalklassifikatin (DDC): 500 Naturwissenschaften und Mathematik > 540 Chemie
Fachbereich(e)/-gebiet(e): 07 Fachbereich Chemie
07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie
Hinterlegungsdatum: 11 Jan 2022 14:46
Letzte Änderung: 12 Jan 2022 07:19
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