Dynamic nuclear polarization with a cyclotron resonance maser at 5 T

Lino R. Becerra; Gary J. Gerfen; Richard J. Temkin; David J. Singel; Robert G. Griffin

doi:10.1103/PhysRevLett.71.3561

Dynamic nuclear polarization with a cyclotron resonance maser at 5 T

Lino R. Becerra, Gary J. Gerfen, Richard J. Temkin, David J. Singel, Robert G. Griffin

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420 Scopus citations

Abstract

DNP (dynamic nuclear polarization) experiments at 5 T are reported, in which a cycoltron resonance maser (gyrotron) is utilized as a 20 W, 140 GHz microwave source to perform the polarization. MAS (magic angle spinning) NMR spectroscopy with DNP has been performed on samples of polystyrene doped with the free radical BDPA (,-bisdiphenylene - phenylallyl) at room temperature. Maximal DNP enhancements of 10 for H1 and 40 for C13 are observed and are considerably larger than expected. The DNP and spin relaxation mechanisms that lead to these enhancements at 5 T are discussed.

Original language	English (US)
Pages (from-to)	3561-3564
Number of pages	4
Journal	Physical Review Letters
Volume	71
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.71.3561
State	Published - 1993
Externally published	Yes

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General Physics and Astronomy

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10.1103/PhysRevLett.71.3561

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title = "Dynamic nuclear polarization with a cyclotron resonance maser at 5 T",

abstract = "DNP (dynamic nuclear polarization) experiments at 5 T are reported, in which a cycoltron resonance maser (gyrotron) is utilized as a 20 W, 140 GHz microwave source to perform the polarization. MAS (magic angle spinning) NMR spectroscopy with DNP has been performed on samples of polystyrene doped with the free radical BDPA (,-bisdiphenylene - phenylallyl) at room temperature. Maximal DNP enhancements of 10 for H1 and 40 for C13 are observed and are considerably larger than expected. The DNP and spin relaxation mechanisms that lead to these enhancements at 5 T are discussed.",

author = "Becerra, {Lino R.} and Gerfen, {Gary J.} and Temkin, {Richard J.} and Singel, {David J.} and Griffin, {Robert G.}",

year = "1993",

doi = "10.1103/PhysRevLett.71.3561",

language = "English (US)",

volume = "71",

pages = "3561--3564",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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T1 - Dynamic nuclear polarization with a cyclotron resonance maser at 5 T

AU - Becerra, Lino R.

AU - Gerfen, Gary J.

AU - Temkin, Richard J.

AU - Singel, David J.

AU - Griffin, Robert G.

PY - 1993

Y1 - 1993

N2 - DNP (dynamic nuclear polarization) experiments at 5 T are reported, in which a cycoltron resonance maser (gyrotron) is utilized as a 20 W, 140 GHz microwave source to perform the polarization. MAS (magic angle spinning) NMR spectroscopy with DNP has been performed on samples of polystyrene doped with the free radical BDPA (,-bisdiphenylene - phenylallyl) at room temperature. Maximal DNP enhancements of 10 for H1 and 40 for C13 are observed and are considerably larger than expected. The DNP and spin relaxation mechanisms that lead to these enhancements at 5 T are discussed.

AB - DNP (dynamic nuclear polarization) experiments at 5 T are reported, in which a cycoltron resonance maser (gyrotron) is utilized as a 20 W, 140 GHz microwave source to perform the polarization. MAS (magic angle spinning) NMR spectroscopy with DNP has been performed on samples of polystyrene doped with the free radical BDPA (,-bisdiphenylene - phenylallyl) at room temperature. Maximal DNP enhancements of 10 for H1 and 40 for C13 are observed and are considerably larger than expected. The DNP and spin relaxation mechanisms that lead to these enhancements at 5 T are discussed.

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DO - 10.1103/PhysRevLett.71.3561

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

ER -

Dynamic nuclear polarization with a cyclotron resonance maser at 5 T

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