Nuclear polarization in core ions of microclusters, "snowballs" in superfluid helium

N. Takahashi, T. Shimoda, H. Miyatake, S. Mitsuoka, H. Ueno, H. Izumi, K. Asahi, S. Morinobu

Research output: Contribution to journalArticlepeer-review


Novel methods were applied successfully to trap ions and to freeze out their nuclear spin polarization inside aggregates of helium atoms, "snowballs" in superfluid helium. Polarized beta-ray emitting 12B ions (T1/2 = 20.4 ms) were injected into superfluid helium and snowballs were created around the impurity ions. Beta rays were detected to locate snowballs and the beta-ray asymmetry was measured to obtain the nuclear polarization of decaying 12B. The comparison with the initial value of 12B polarization produces that no relaxation in polarization was observed throughout lifetime of 12B.

Original languageEnglish
Pages (from-to)369-370
Number of pages2
JournalCzechoslovak Journal of Physics
Issue numberSUPPL. 1
StatePublished - 1996
Externally publishedYes


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