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Manuscript Title: JADJAD: simulation of inelastic nucleus-nucleus interactions below 5GeV.
Authors: H.N. Agakishiev, V.G. Grishin, K. Hanssgen, T. Kanarek, R.M. Mechtiev
Program title: JADJAD
Catalogue identifier: ABBK_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 48(1988)391
Programming language: Fortran.
Computer: ESER EC 1040.
Operating system: MVT, SVS.
RAM: 5K words
Word size: 32
Keywords: Particle physics, Nuclear physics, Scattering, Event simulation, High energy reaction, Nucleon Nucleon interaction, Elementary, Nucleus interaction, Monte-carlo, Nucleus nucleus Interaction, Row-on-row-picture, Nucleon Nuclear reaction.
Classification: 11.2, 17.8.

Subprograms used:
Cat Id Title Reference
AADO_v1_0 NUCRIN CPC 39(1986)53
AADN_v1_0 HADRIN CPC 39(1986)37
ACFS_v1_0 DECAY CPC 31(1984)411

Nature of problem:
The interaction of a high energy nucleus with a nucleus at rest is described due to the phenomenological interaction model. The model is applicable for collisions of projectile and target nuclei with nucleon numbers inside the interval 4<= A <=240. It describes the production and emission of pions, kaons, nucleons, antikaons and hyperons. The hadron-nucleon and hadron-nucleus interaction mechanisms, representing one part of the model basis, are described elsewhere. The colliding matter is divided into central and peripheral interaction regions due to geometric-optical model considerations. While in the peripheral interaction region only one nucleon of a nucleus acts on the peripheral nucleons of the other nucleus, in the central interaction region the nucleon interaction proceeds in a simple row-on-row-picture. Energy and additive quantum numbers are conserved.

Solution method:
The Monte-Carlo simulation of the inelastic interactions is constructed via the hadron-nucleon interaction and hadron nucleus interaction models. Parameterized formulae are used in order to describe geometrical picture and random choice of interacting nucleons. The kinematic variables of the sampled particles are transformed into the laboratory system.

The nucleon numbers of the colliding nuclei may be inside the interval 4<^ A <^ 240; the projectile laboratory momenta are restricted to the interval 0.5<^ plab <^ 5 GeV/c.nucl.. The Pauli-principle is only applied for nucleons. Interactions of cascade hadrons one to another are neglected.

Running time:
JADJAD simulates one inelastic nucleus-nucleus interaction in about 0.15 up to 0.9 seconds central processor time on an ESER 1040 computer or about 0.006 up to 0.04 s on an IBM 3081, dependent on the nucleus size and the momentum of the projectile nucleus.