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Real-Time Polarimetry of Hyperpolarized 13C Nuclear Spins Using an Atomic Magnetometer
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We introduce a method for nondestructive quantification of nuclear spin polarization, of relevance to hyperpolarized spin tracers widely used in magnetic resonance from spectroscopy to in vivo imaging. In a bias field of around 30 nT we use a high-sensitivity miniaturized 87Rb-vapor magnetometer to measure the field generated by the sample, as it is driven by a windowed dynamical decoupling pulse sequence that both maximizes the nuclear spin lifetime and modulates the polarization for easy detection. We demonstrate the procedure applied to a 0.08 M hyperpolarized [1-13C]-pyruvate solution produced by dissolution dynamic nuclear polarization, measuring polarization repeatedly during natural decay at Earth's field. Application to real-time and continuous quality monitoring of hyperpolarized substances is discussed.
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MOULOUDAKIS, K., BODENSTEDT, S., AZAGRA, Marc, MITCHELL, M. w., MARCO RIUS, Irene, TAYLER, Michael c. d.. Real-Time Polarimetry of Hyperpolarized 13C Nuclear Spins Using an Atomic Magnetometer. _Journal Of Physical Chemistry Letters_. 2023. Vol. 14, núm. 5, pàgs. 1192-1197. [consulta: 30 de gener de 2026]. ISSN: 1948-7185. [Disponible a: https://hdl.handle.net/2445/206206]