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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.

Restrictions:
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.