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Svensson, E. C.; Sears, V. F.; Woods, A. D. B.; Martel, P.

doi:10.1103/physrevb.21.3638

Cited by 218 publications

(149 citation statements)

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“…On the other hand, we have discarded earlier data from the same group [16,17] because an error in the calibration was pointed out [14]; yet we have included the corrected values from their earlier data set [16,17] as given by this group [13]. This calibration error has been overlooked in a review about liquid helium properties at svp [18], where only [9] and [16] were considered, leading to a discrepancy in the region of the peak, and to the arbitrary choice of a spline near the average of the two sets of data as the recommended value for S(q). The experimental conditions of the X-ray experiments we have selected are given in Table 1.…”

Section: S(q ω) = Z(q) δ ω − ω(Q) + S M (Q ω)mentioning

confidence: 99%

“…1b). Cowley and Woods [1] and Svensson et al [9] give directly S(q). Some other papers give S(q, ω) in absolute units, allowing a calculation of the zeroth moment S(q) and of χ(q) through (3); note that this gives more or less accurate lower bounds depending on the maximum energy transfer produced in the experiments.…”

Section: S(q ω) = Z(q) δ ω − ω(Q) + S M (Q ω)mentioning

confidence: 99%

“…3 (Color online) The peak of the static structure factor S pk of helium 4 as a function of pressure. In addition to neutron data [1,[8][9][10], we have included X-ray measurements [12][13][14] and QMC calculations [27,28]. The correspondence between symbols and references is given in the legend.…”

Section: Discrepancies and Proposed Correctionsmentioning

confidence: 99%

“…We have selected here those which give information about S(q), Z(q), and/or χ(q) and their pressure dependence, including neutron [1,[7][8][9][10][11] and X-ray [12][13][14] scattering data. Table 1 summarizes the experimental conditions; when absolute units are used, the corresponding calibration method is described.…”

Section: S(q ω) = Z(q) δ ω − ω(Q) + S M (Q ω)mentioning

confidence: 99%

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Static Structure Factor and Static Response Function of Superfluid Helium 4: a Comparative Analysis

Caupin¹,

Boronat

Andersen

2008

J Low Temp Phys

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Extensive neutron scattering data on liquid helium 4 are available, and have been analyzed to give a number of physical quantities, e.g. static structure factor S(q), excitation energy, and roton linewidth. X-rays also give access to S(q). However, a comprehensive comparison between experimental data and theoretical results, including their dependence on pressure, is still lacking. The static response function χ(q) has been particularly overlooked, despite its fundamental role in theories of inhomogeneous helium. We present here a critical review about the strength of the main peaks of S(q) and χ(q). We include in the comparison the analysis of unpublished neutron data and new Monte-Carlo calculations of χ(q). We find a significant discrepancy between experiments, and suggest corrections which account for some of the differences. We give recommendations for the best values to use for S(q) and χ(q).

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Section: S(q ω) = Z(q) δ ω − ω(Q) + S M (Q ω)mentioning

confidence: 99%

Section: S(q ω) = Z(q) δ ω − ω(Q) + S M (Q ω)mentioning

confidence: 99%

Section: Discrepancies and Proposed Correctionsmentioning

confidence: 99%

Section: S(q ω) = Z(q) δ ω − ω(Q) + S M (Q ω)mentioning

confidence: 99%

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Static Structure Factor and Static Response Function of Superfluid Helium 4: a Comparative Analysis

Caupin¹,

Boronat

Andersen

2008

J Low Temp Phys

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“…In fact one ought to employ quantities computed for given T. Actually, there exist experimental data 29 and also PIMC studies 13,25 on the T dependence of the pair-distribution function g(r,T). However, in view of the above arguments we shall use the one for Tϭ0.…”

Section: ͑16͒mentioning

confidence: 99%

Large-qneutron inclusive-scattering data from liquid4He

et al. 1998

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We report dynamical calculations for large-q structure functions of liquid 4 He at Tϭ1.6 and 2.3 K and compare those with recent MARI data. We extend those calculations far beyond the experimental range qр29 Å Ϫ1 in order to study the approach of the response to its asymptotic limit for a system with interactions having a strong short-range repulsion. We find only small deviations from theoretical 1/q behavior, valid for smooth V. We repeat an extraction by Glyde et al. of cumulant coefficients from data which are invariably very well reproduced. We argue that fits determine the single atom momentum distribution, but express doubt as to the extraction of meaningful final state interaction parameters. ͓S0163-1829͑98͒02709-X͔

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Fluid Mechanics

Marder¹

2010

Condensed Matter Physics

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Neutron-diffraction study of the static structure factor and pair correlations in liquidHe4

Cited by 218 publications

References 50 publications

Static Structure Factor and Static Response Function of Superfluid Helium 4: a Comparative Analysis

Static Structure Factor and Static Response Function of Superfluid Helium 4: a Comparative Analysis

Large-qneutron inclusive-scattering data from liquid4He

Fluid Mechanics

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