We present electric deflection results for the fullerenes C₆₀ and C₇₀ obtained with a long-baseline matter-wave interferometer. The second grating of the interferometer is interchangeable between a material grating for fast atom beams and an optical phase grating for polarizable molecules. This allows us to use cesium as a calibration particle and thus measure molecular susceptibilities with improved systematic uncertainty. The static polarizabilities of C₆₀ and C₇₀ are measured as 4_πɛ0×87.4±0.4±2.5ų and 4_πɛ0×106.4±0.2±1.1ų, respectively, in excellent agreement with previous deflection experiments, but with improved uncertainties.

Physical Review Research:

Y.Y. Fein, P. Geyer, F. Kiałka, S. Gerlich, M. Arndt
Improved accuracy fullerene polarizability measurements in a long-baseline matter-wave interferometer,
Phys. Rev. Research 1, 033158 (2019). DOI 10.1103/PhysRevResearch.1.033158