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Manuscript Title: Computation of phonon spectrum from the cold neutron incoherent inelastic scattering by a polycrystal.
Authors: T.D. Sokolovskij, L.A. Rogoschenko
Program title: RESTOR 1
Catalogue identifier: ACXT_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 13(1977)381
Programming language: Fortran.
Computer: EC 1030.
Operating system: DOS.
RAM: 80K words
Word size: 60
Keywords: Solid state physics, Phonon spectrum, Incoherent, Inelastic, Scattering, Neutron cold, Monocrystal, Polycrystal, Crystal structure.
Classification: 7.6, 7.8.

Nature of problem:
RESTOR 1 computes the phonon spectrum from the incoherent inelastic scattering data of cold neutrons by a polycrystal consisting of identical atoms.

Solution method:
A nonlinear integral equation for the phonon frequency distribution in a polycrystal is constructed. This equation is solved by the method of consecutive approximations.

The program is limited to polycrystals with identical atoms. It is assumed that the neutrons are scattered with energy gain. But the program RESTOR 1 provides for the case of scattering with energy loss, when the factor exp(epsilon/kBT} appears on the right-hand side of eq. (4) in the long write-up.

Running time:
The time required for the test run is 4 min 30 s on the EC 1030 computer, of which 2 min is taken in compiling.