Momentum Distributions in Liquid 4 He
1989; Institute of Physics; Volume: 9; Issue: 7 Linguagem: Inglês
10.1209/0295-5075/9/7/016
ISSN1286-4854
AutoresT. R. Sosnick, W. M. Snow, P. E. Sokol, R. N. Silver,
Tópico(s)Atomic and Subatomic Physics Research
ResumoWe report high-resolution neutron scattering measurements at Q = 23 Å−1 of 4He in the low-temperature superfluid and in the normal liquid phase at much higher momentum transfers than in previous measurements. When the impulse approximation prediction is broadened according to a recent theory for final-state effects, the data are in excellent agreement with ab initio Monte Carlo calculations of momentum distributions, which predict a Bose condensate fraction of 9.2% in the superfluid at T = 0 K.
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