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Manuscript Title: An algorithm for a semiempirical nuclear fragmentation model.
Authors: F.F. Badavi, L.W. Townsend, J.W. Wilson, J.W. Norbury
Program title: NUCFRAG
Catalogue identifier: ABBG_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 47(1987)281
Programming language: Fortran.
Computer: C.D.C. CYBER/750.
Operating system: NOS 2.3 LEVEL 617.
RAM: 12 K words
Word size: 60
Keywords: Nuclear physics, Scattering, Ablation, Hze, Overlap region, Impact parameter, Cross section, Electro Magnetic dissociation, Abrasion, Ion, Fragmentation, Projectile, Virtual photon, Target, Final state, Heavy ion.
Classification: 17.7.

Nature of problem:
Interactive program NUCFRAG, presents an algorithm for an abrasion/ ablation model of heavy ion fragmentation which includes a second order correction for the surface energy term and addition of photonuclear dissociation to provide reasonable representation of the present elemental fragmentation cross sections.

Solution method:
Using the Weizsacker-Williams method of virtual quanta, the photodissociation fragmentation cross sections are calculated and added to the nuclear fragmentation cross sections generated by an abrasion/ ablation model of heavy ion collision.

The photodissociation cross sections are calculated for one nucleon removal only (either a proton or neutron). The nuclear interaction fragmentation cross sections are not calculated for target fragments and peripheral collisions with Delta A < 0.5.

Running time:
On C.D.C - Cyber/750 at NASA Langley Research Center, compilation takes about 20-30 seconds, while execution is about 60-90 seconds.