High Proton Polarization by Microwave-Induced Optical Nuclear Polarization at 77 K | Zendy

M. Iinuma | Zendy; Yusuke Takahashi | Zendy; I. Shaké | Zendy; Masahiko Oda | Zendy; A. Masaike | Zendy; T. Yabuzaki | Zendy; Hirohiko M. Shimizu | Zendy

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High Proton Polarization by Microwave-Induced Optical Nuclear Polarization at 77 K

Author(s) -

M. Iinuma,

Yusuke Takahashi,

I. Shaké,

Masahiko Oda,

A. Masaike,

T. Yabuzaki,

Hirohiko M. Shimizu

Publication year - 2000

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.84.171

Subject(s) - polarization (electrochemistry) , microwave , neutron , materials science , pentacene , nuclear magnetic resonance , magnetic field , physics , atomic physics , nuclear physics , chemistry , nanotechnology , quantum mechanics , layer (electronics) , thin film transistor

Protons in naphthalene and p-terphenyl doped with pentacene have been polarized up to 32% and 18%, respectively, at liquid nitrogen temperature in a magnetic field of 0.3 T by means of microwave-induced optical nuclear polarization. The polarization was measured by nuclear magnetic resonance as well as by the neutron transmission method. The relaxation time of the proton polarization at 0.0007 T and 77 K was found to be almost 3 h and the polarization enhancement reached a record value of 8x10(4). The usefulness of the method in many areas of physics and chemistry is discussed.

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