DENSITY EVOLUTION OF THE KINETIC-ENERGY OF FLUID AND SOLID HE-4 AT T=6.1 K

Authors
BAFILE U ZOPPI M BAROCCHI F MAGLI R MAYERS J
Citation
U. Bafile et al., DENSITY EVOLUTION OF THE KINETIC-ENERGY OF FLUID AND SOLID HE-4 AT T=6.1 K, Physical review. B, Condensed matter, 54(17), 1996, pp. 11969-11972
Citations number
15
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
54
Issue
17
Year of publication
1996
Pages
11969 - 11972
Database
ISI
SICI code
0163-1829(1996)54:17<11969:DEOTKO>2.0.ZU;2-Q
Abstract
By means of neutron Compton scattering, we have measured the momentum distribution of He-4, on the isotherm T = 6.1 K, in the pressure range between 0 and 500 bars. The second moment of the distribution gives t he value of the kinetic energy. This is a function of density that inc reases from the classical value (3/2)k(B)T up to similar to 5 times th is value in the compressed solid. The kinetic energy data show a chang e in the density behavior at melting. This suggests that the change of symmetry influences the single-particle distribution function.