Proof-of-principle Experiment of <sup>4</sup>He Excimer Cluster Generation via Neutron-<sup>3</sup>He Absorption Reaction for Visualization of Velocity Fields in Superfluid <sup>4</sup>He

DOI Web Site Web Site 8 References

Bibliographic Information

Other Title
  • 超流動<sup>4</sup>He中の流れ場可視化にむけた中性子<sup>3</sup>He吸収反応による<sup>4</sup>He励起分子集団生成の実証
  • 超流動⁴He中の流れ場可視化にむけた中性子³He吸収反応による⁴He励起分子集団生成の実証
  • チョウリュウドウ ⁴ He チュウ ノ ナガレバ カシカ ニ ムケタ チュウセイシ ³ He キュウシュウ ハンノウ ニ ヨル ⁴ He レイキ ブンシ シュウダン セイセイ ノ ジッショウ

Search this article

Description

<p>For visualization of flows in superfluid 4He, an excited helium molecule (excimer) 4He2* is an ideally suitable flow tracer, because it has a molecular size with a minimum influence to flow, and follows only normal-component flow around 1K but only vortices below 0.5 K. However, to visualize flow fields in 3D, small clouds (clusters) of 4He2* are required, whose generation method has not been established. To generate such clusters, we proposed the use of neutron-3He absorption reaction. In the proof-of-principle experiments, we have confirmed the 4He2* generation, while the detail of clusters still remains undetermined. The concept, methods, progress, and present status are shown.</p>

Journal

  • hamon

    hamon 30 (4), 192-196, 2020-11-10

    The Japanese Society for Neutron Science

References(8)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top