We prepared a robust, simple and dedicated torsion balance, designed to evidence interaction neutrinos with a force sensitivity varying between 10-6 and 10-8 dyne, i.e. comparable with those reported by Weber.The torsion balance uses two alternatives for the pendulum assembly with wolfram and molibdenum gold plated annealed wires having diameters of (25-50)micrometers and the length between (27-100)cm.The Sun as a well-defined neutrino source also provides extremely important opportunities to investigate nontrivial neutrino properties such as nonzero mass and mixing, because of the wide range of matter density and the great distance from the Sun to the Earth.Observation of solar neutrinos directly address the theory of stelar structure and evolution , which is the bases of the standard model (SSM).
Experimentally we used sapphire and lead. A diurnal effect is predicted as the position of the Sun changes relative to the balance. We have been observing the diurnal efect when the Sun is in direction of the line normal to the diameter joing the two masses.
The results are consist with Weber's hypothesis of very large cross sections for neutrinos incident on stiff perfect crystals.