High proton polarization by microwave-induced optical nuclear polarization at 77 K
Phys Rev Lett
; 84(1): 171-4, 2000 Jan 03.
Article
in En
| MEDLINE
| ID: mdl-11015862
ABSTRACT
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.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2000
Document type:
Article
Affiliation country:
Japón