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Manuscript Title: Program package for calculating matrix elements of two-cluster structures in nuclei.
Authors: R. Krivec, M.V. Mihailovic
Program title: PRO2C
Catalogue identifier: AAOI_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 28(1982)153
Programming language: Fortran.
Computer: CDC CYBER 172.
Operating system: NOS/BE 1.3.
RAM: 76K words
Word size: 60
Peripherals: disc.
Keywords: Nuclear physics, Cluster model, Interplay of different Cluster structures, Angular momentum Projection, Symbolic algebra, Word addressable files.
Classification: 17.21.

Subprograms used:
Cat Id Title Reference
AAOG_v1_0 DFIDTH CPC 28(1982)153
AAOH_v1_0 STOKER CPC 28(1982)153

Nature of problem:
The dynamics of a nucleus with cluster structure or with an interplay of different cluster structures lies in the corresponding Hill-Wheeler equation. The kernels of this equation are matrix elements of the Hamiltonian and the identity between functions obtained from Slater determinants of cluster structures by the angular momentum and parity projection. The purpose of program PRO2C is to calculate the necessary matrix elements.

Solution method:
Projection of angular momentum and parity employed is an algebraic one without resort to numerical integration. Matrix elements between projected functions are expressed in terms of those between unprojected ones (Slater determinants). The latter are first expanded into partial waves. Program PRO2C then uses the two files with the Word Addressable organization constructed by the programs DFIDTH and STOKER, respectively. The program is optimized with respect to time consumption.

The present version of PRO2C allows for at most one 1p single particle state in any given cluster structure, and for at most two nucleons in the unfilled shells. These restrictions affect a comparatively small part of subprograms and can be removed (see below).

Unusual features:
Two disk files with CDC Word Addressable organization are used (with the Record Manager routines).

Running time:
2.7 s for the test run.