X-ray studies of structural changes of impurity-helium solids

S. I. Kiselev, V. V. Khmelenko, D. M. Lee, Valery Kiryukhin, R. E. Boltnev, E. B. Gordon, B. Keimer

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We have performed studies of the formation and evolution of samples of Im-Helium (Im=Ne, D2, N2) solids obtained by allowing a mixed beam of helium and impurity molecules to fall onto the surface of superfluid helium. Clusters consisting of single impurity molecules and/or small aggregates of the molecules surrounded by layers of solid helium agglomerate to form porous solids. These solids have been studied by x-ray diffraction techniques. As the solids were heated above their formation temperature of T=1.5 K, the small aggregates or clusters of impurities tended to form larger clusters, which x-ray diffraction revealed to be nanocrystallites ranging in size from 3 to 6 nm.

Original languageEnglish (US)
Pages (from-to)235-240
Number of pages6
JournalJournal of Low Temperature Physics
Issue number1-2
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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