Search for New Gravity-like Short Range Interactions in the Submicron Range by means of Neutron-nanoparticle Scattering Ⅱ

The small-angle neutron scattering (SANS) measures the scattering intensity as a function of the momentum transfer which is the Fourier transform of the shape of the scattering potential which is used to distinguish new gravitylike interaction from the nuclear potential.

The SANS experiments using noble gas targets have been performed to search for new gravitylike interaction in the nanometer range[1][2]. But the sensitivity of those measurements is many orders of magnitude worse than the range of the coupling constant predicted by the Large-Extra-Dimension (LED) models [3].

Therefore, we proposed using coherent scattering for nanoparticle targets to improve sensitivity significantly [4].

Since the angular distribution also depends on the target size, it is necessary to subtract this effect measure the particle size distribution accurately.by using X-ray small-angle scattering to obtain the particle size distribution. For that purpose, X-ray small-angle scattering measurement is performedmeasured at the Aichi Synchrotron Radiation Center in Japan.

We are also planning experiments using hydrogen-absorbing vanadium nanoparticle targets.

In this presentation, I will describe the analysis results of the SANS experiment in June 2023 and the plan for future experiments on hydrogen-absorbing vanadium nanoparticles.