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論文

Fast nuclear-spin conversion of H $_{2}$ trapped and polarized in a CO $_{2}$ matrix

山川紘一郎; 石橋篤季*; 波吉敏信*; 東優一*; 荒川一郎*

Physical Review B, 102(4), p.041401_1 - 041401_5, 2020/07

https://doi.org/10.1103/PhysRevB.102.041401

被引用回数：2 パーセンタイル：9.38(Materials Science, Multidisciplinary)

The clear evidence for the nuclear spin conversion of matrix-isolated H $_{2}$ is presented. We trapped H $_{2}$ in a CO film at 5.4 K and detected the induced infrared-absorption band including both the components of ortho and para H $_{2}$ . By analyzing its time-evolution, the conversion rate was determined to be 9.4 10 $^{-4}$ s $^{-1}$ . We confirmed that this fast conversion was induced just by the CO film with the uniquely unstable structure. We also identified H $_{2}$ at another kind of trapping sites, accompanied by higher anisotropy of the confining potential, and estimated its conversion rate to be 6 10 $^{-3}$ s $^{-1}$ .