Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Coherent manipulation of non-thermal spin order in optical nuclear polarization experiments. / Buntkowsky, Gerd; Ivanov, Konstantin L.; Zimmermann, Herbert и др.
в: Journal of Chemical Physics, Том 146, № 11, 114501, 21.03.2017.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Coherent manipulation of non-thermal spin order in optical nuclear polarization experiments
AU - Buntkowsky, Gerd
AU - Ivanov, Konstantin L.
AU - Zimmermann, Herbert
AU - Vieth, Hans Martin
N1 - Publisher Copyright: © 2017 Author(s).
PY - 2017/3/21
Y1 - 2017/3/21
N2 - 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.
AB - 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.
KW - EXCITED TRIPLET-STATE
KW - MOLECULAR MIXED-CRYSTALS
KW - PICOSECOND PHOTON-ECHO
KW - CROSS-POLARIZATION
KW - SOLID-STATE
KW - SATURATION SPECTROSCOPY
KW - DYNAMIC POLARIZATION
KW - NAPHTHALENE CRYSTALS
KW - VIBRONIC RELAXATION
KW - ANTHRACENE-CRYSTALS
UR - http://www.scopus.com/inward/record.url?scp=85016152997&partnerID=8YFLogxK
U2 - 10.1063/1.4976990
DO - 10.1063/1.4976990
M3 - Article
AN - SCOPUS:85016152997
VL - 146
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 11
M1 - 114501
ER -
ID: 10266362