1H NMR noise measurements in hyperpolarized liquid samples

Patrick Giraudeau; Norbert Müller; Alexej Jerschow; Lucio Frydman

doi:10.1016/j.cplett.2010.02.026

¹H NMR noise measurements in hyperpolarized liquid samples

Patrick Giraudeau, Norbert Müller, Alexej Jerschow, Lucio Frydman

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Noise measurements of nuclear spin systems using a tuned circuit can reveal the signatures of two different phenomena: Thermal circuit noise absorbed by the spin system, and nuclear spin-noise leading to tiny fluctuating magnetization components. Polarization enhancement can increase the observed noise amplitudes due to an enlarged coupling with the reception circuit. In this work we explore the detection of noise in ¹H NMR of liquid water samples whose spin alignment is enhanced via ex situ dynamic nuclear polarization. A number of ancillary phenomena related to this kind of experiments are also documented.

Original language	English (US)
Pages (from-to)	107-112
Number of pages	6
Journal	Chemical Physics Letters
Volume	489
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2010.02.026
State	Published - Apr 1 2010

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2010.02.026

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AU - Frydman, Lucio

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Y1 - 2010/4/1

N2 - Noise measurements of nuclear spin systems using a tuned circuit can reveal the signatures of two different phenomena: Thermal circuit noise absorbed by the spin system, and nuclear spin-noise leading to tiny fluctuating magnetization components. Polarization enhancement can increase the observed noise amplitudes due to an enlarged coupling with the reception circuit. In this work we explore the detection of noise in 1H NMR of liquid water samples whose spin alignment is enhanced via ex situ dynamic nuclear polarization. A number of ancillary phenomena related to this kind of experiments are also documented.

AB - Noise measurements of nuclear spin systems using a tuned circuit can reveal the signatures of two different phenomena: Thermal circuit noise absorbed by the spin system, and nuclear spin-noise leading to tiny fluctuating magnetization components. Polarization enhancement can increase the observed noise amplitudes due to an enlarged coupling with the reception circuit. In this work we explore the detection of noise in 1H NMR of liquid water samples whose spin alignment is enhanced via ex situ dynamic nuclear polarization. A number of ancillary phenomena related to this kind of experiments are also documented.

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¹H NMR noise measurements in hyperpolarized liquid samples

Abstract

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