CORRELATED ATOMIC MOTIONS IN GLASSY SELENIUM

The elastic and total (energy-integrated) structure factors for glassy selenium have been measured by means of neutron spectroscopy within t he temperature range 15K less than or equal to T less than or equal to 310K. The correlated nature of the atomic vibrations gives rise to ma rked features in the total (energy-integrated) inelastic structure fac tors defined as the difference between the total and elastic intensiti es. Also, both structure factors show rather distinct dependences with temperature, which are discussed in some detail.