At the smallest scales of nature, the rules of the world shift in ways that can feel unsettling and beautiful at the same time. Matter no longer behaves like solid objects moving along clear paths.

SO-CALLED extra or forbidden rings have been observed from time to time in electron diffraction patterns, and their origin has been attributed to half-order diffractions or impurities. Cases in which ...

IN the past five years, neutron diffraction analysis has been carried out with wide neutron beams and specimens of several cubic centimetres in volume, in order to obtain a manageable diffracted ...