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Manuscript Title: A nuclear Hartree-Fock intrinsic wavefunction projection program.
Authors: J.F. Allard, N. Boumahrat, B. Houssais, M. Hadj Hassan, M. Lambert
Program title: PROJ
Catalogue identifier: ABGI_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 4(1972)239
Programming language: Fortran.
Computer: IBM 360/40.
Operating system: DOS.
RAM: 19K words
Word size: 32
Keywords: Nuclear physics, Schrodinger equation, Rotational band, Peierls yoccoz method, Hartree-fock.
Classification: 17.22.

Nature of problem:
PROJ calculates energies of the rotational band generated by a nuclear wave function PhiM which is an eigenstate of JZ with the eigenvalue M. The nuclear wave function may be obtained by using program HARFOCK (CPC 3 (1972) 22). The two-body interaction must be a sum of two gaussian potentials with arbitrary spin, isospin and space-exchange terms.

Solution method:
The energy of each rotational state is evaluated by the Peieris-Yoccoz formula. For each value of the rotation angle, Beta, chosen by the integration program, the matrix elements occuring are evaluated.

Restrictions:
The geometrical basis includes the 1s, 1p and 2s, 1d deformed shells. The program works with 40 occupied and unoccupied orbitals. The interaction must be expotential. The c.m. two-body elements are taken into account but the Coulomb interaction is neglected. Orbitals must be eigenstates of Jz and rz. M must be positive or equal to 0.