Accession Number : ADA141054

Title :   Spin-Polarized Triplet Helium.

Descriptive Note : Interim rept. Jul 83-Jan 84,

Corporate Author : JET PROPULSION LAB PASADENA CA

Personal Author(s) : Zmuidzinas,J S

PDF Url : ADA141054

Report Date : Apr 1984

Pagination or Media Count : 46

Abstract : It is pointed out that bulk quantities of spin-polarized Triplet He* (2 Superscript 3 subscript 1) and Triplet He2* He2(a Superscript 3 sigma subscript u (+) should form insulating classical solids, respectively denoted as He IV-A and He IV-M. Estimates of some basic physical properties of He IV-A are given. A metallic phase of He IV-A is considered and modeled by a two-component Fermi fluid of spin-polarized He(+), ions and electrons. This metallic phase is predicted to occur at r subscript s approx. 2.3 and to lie considerably lower in energy than insulating He IV-A(M), making it the preferred phase to be looked for experimentally. A number of deexcitation mechanisms of atomic, dimerized, and bulk He* are identified, and the open problem of stability is discussed. A method is proposed to produce He IV-M, and ultimately metallic He IV-A, by optically pumping the He2* species produced by electron bombardment of superfluid helium. (Author)

Descriptors :   *Helium, Metastable state, Spin states, Polarization, Insulation, Solids, Physical properties, Metals, Phase, Fermi surfaces, Fluids, Ions, Electrons, Excitation, Stability, Group IVA metals, Optical pumping

Subject Categories : Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE