aSi:H short range order by neutron scattering

Abstract A neutron scattering study of aSi:H, has been undertaken in order to point out the part played by hydrogen in the structural properties. The isotopic substitution method provide us with the three partial structure factors from which have been deduced the three corresponding pair partial correlation functions. SiH and SiH 2 units have been directly put into light. These hydrogenated units have not produced noticeable distortion of the tetrahedral local order.