Workshop summary: 'S(Q) measurements by chopper machine'

摘要

Total diffractometers are used to measure S(Q) (S(Q): static structure factor, Q: momentum transfer) of liquids and glassy materials. However, measured S(Q) are integration of S(Q, E) along non-constant Q path and weighted by I( lambda ) (see references). Therefore it is almost impossible to obtain "real" S(Q) altohough many correction methods have been developed. Especially, in liquid samples, which contain light atoms like hydrogen, inelastic effect is not negligible and very careful data reduction is required. In a next generation pulsed neutron source, S(Q) of liquids with very high accuracy will be very important and a quick data reduction will be also required.