Short-lived beta-ray emitters, 12B, sustaining nuclear spin polarization were introduced into superfluid helium. The nuclear polarization of 12B was observed via measurement of beta-ray asymmetry. It was found that the nuclear polarization was preserved throughout the lifetime of 12B (20.3 ms). This suggests that the "snowball", an aggregation of helium atoms produced around an alien ion, constitutes a suitable milieu for freezing-cut the nuclear spin of the core ion and that most likely the solidification takes place at the interior of the aggregation.
|Number of pages||8|
|Publication status||Published - Dec 1 1996|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry