Abstract
Raman spectra of superfluid $^{4}\mathrm{He}$ under saturated vapor pressure are measured at 1.37 K. Distinct changes in the slope ${\mathrm{dI}}_{R}$/dE are confirmed at several energy values in the plot of Raman intensity (${I}_{R}$) as a function of the energy shift (E) for a measurement with relatively high instrumental resolution. Depolarization ratios are determined up to the energy shift at 420 K. Existence of s partial-wave scattering is confirmed.
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