Dynamic proton polarization in butanol water below 1 K

D. A. Hill*, J. B. Ketterson, R. C. Miller, A. Moretti, R. C. Niemann, L. R. Windmiller, A. Yokosawa, C. F. Hwang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We have measured the temperature dependence of the dynamic proton polarization in a 0.2-g sample of 95% 1-butanol and 5% water, containing 0.75% of the free radical porphyrexide, between 1.4 and 0.5 K. The largest polarization attained was 67% at 0.5 K. The feasibility of achieving comparable polarization in larger samples and the question of the origin of the observed temperature dependence are discussed.

Original languageEnglish (US)
Pages (from-to)460-462
Number of pages3
JournalPhysical review letters
Issue number9
StatePublished - 1969

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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