期刊
出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2005.05.062
关键词
polarized target; aromatic molecules; unstable nuclei
A proton polarizing system for use in scattering experiments with radioactive isotope beams is described. Protons in a naphthalene crystal doped with pentacene are polarized in a magnetic field of 0.3 T at 100 K by transferring a large population difference among the photo-excited triplet states of pentacene to the hydrogen nuclei. An Ar-ion laser, which demands minimal maintenance during scattering experiments, is employed to excite the pentacene molecules. A proton polarization of 37% is obtained. (c) 2005 Elsevier B.V. All rights reserved.
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