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Observation of Noise‐Triggered Chaotic Emissions in an NMR‐Maser
Author(s) -
Marion Denis J.Y.,
Huber Gaspard,
Berthault Patrick,
Desvaux Hervé
Publication year - 2008
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800113
Subject(s) - magnetization , xenon , maser , radio frequency , relaxation (psychology) , excitation , polarization (electrochemistry) , magnetization dynamics , physics , chaotic , chemistry , nuclear magnetic resonance , hyperpolarization (physics) , condensed matter physics , atomic physics , magnetic field , nuclear magnetic resonance spectroscopy , optics , quantum mechanics , psychology , artificial intelligence , telecommunications , social psychology , computer science
Abstract We report a new phenomenon observed when the magnetization of dissolved hyperpolarized 129 Xe is intense and opposite to the Boltzmann magnetization. Without radio‐frequency (rf) excitation, the system spontaneously emits a series of rf bursts characterized by very narrow bandwidths (0.03 Hz at 138 MHz). This chaotic NMR‐maser illustrates the increase in the complexity of spin dynamics at high magnetization levels by unveiling an inhomogeneous spatial organization of the xenon magnetization and an apparent dependence of the xenon transverse relaxation time on its polarization and/or on time.