Direct determination of the helium interatomic core potential by neutron scattering
W Montfrooij; I M de Schepper; L A de Graaf; A K Soper; W S Howells; W Montfrooij; Interfaculty Reactor Inst., Delft Univ. of Technol., Netherlands; I M de Schepper; Interfaculty Reactor Inst., Delft Univ. of Technol., Netherlands; L A de Graaf; Interfaculty Reactor Inst., Delft Univ. of Technol., Netherlands; A K Soper; Interfaculty Reactor Inst., Delft Univ. of Technol., Netherlands; W S Howells; Interfaculty Reactor Inst., Delft Univ. of Technol., Netherlands
Журнал:
Journal of Physics: Condensed Matter
Дата:
1990-03-12
Аннотация:
The three derivatives of the static structure factor S(k) with respect to density n, temperature T and wavenumber k are determined for He at n=18.7 nm<sup>-3</sup> and T=13.3 K by means of neutron scattering. Using an exact scaling relation valid for interatomic core potentials phi (r)= epsilon ( sigma /r)<sup>l</sup>, the results for helium are consistent with a power l=18+or-2.
210Кб