Computer Physics Communications Program Library

Programs in Physics & Physical Chemistry



Manuscript Title: MOMDIS: a Glauber model computer code for knockout reactions
Authors: C.A. Bertulani, A. Gade
Program title: MOMDIS (MOMentum DIStributions)
Catalogue identifier: ADXZ_v1_0 Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 175(2006)372
Programming language: Fortran-77.
Computer: The code has been created on an IBM-PC, but also runs on UNIX or LINUX machines.
Operating system: WINDOWS or UNIX.
RAM: 16 Mbytes of RAM memory and 2 MB of hard disk space
Keywords: Momentum distributions, Breakup, Stripping, Diffraction dissociation.
PACS: 25.60.Gc, 24.50.+g, 25.60.-t.
Classification: 17.11, 17.19.
Nature of problem: The program calculates bound wavefunctions, eikonal S-matrices, total cross sections and momentum distributions of interest in nuclear knockout reactions at intermediate energies.
Solution method: Solves the radial Schrödinger equation for bound states. A Numerov integration is used outwardly and inwardly and a matching at the nuclear surface is done to obtain the energy and the bound state wavefunction with good accuracy. The S-matrices are obtained using eikonal wavefunctions and the "t-ρρ" method to obtain the eikonal phase-shifts. The momentum distributions are obtained by means of a gaussian expansion of integrands. Main integrals are performed with the Simpson's method.
Running time: Almost all CPU time is consumed by calculations of integrals, specially for transverse momentum distributions which involves multiple integral loops. It takes up to 30 min on a 2GHz Intel P4-processor machine.