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Manuscript Title: Particle-vibration coupling model for odd-A nuclei.
Authors: R.D. Purrington
Program title: PARTICLE-VIBRATION COUPLING
Catalogue identifier: ABLP_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 58(1990)211
Programming language: Fortran.
Computer: DEC 20-60.
Operating system: TOPS-20, MUSIC, CMS.
RAM: 20K words
Word size: 36
Peripherals: magnetic tape.
Keywords: Nuclear physics, Collective model, Vibrational excitations, Intermediate coupling, Unified model.
Classification: 17.20.

Nature of problem:
Energy levels, static moments, and electromagnetic transition rates are obained for odd-A vibrational nuclei using the Intermediate Coupling Unified Model. The appropriate single particle states are coupled to vibrational excitations of the neighboring even-even core. The single particle energies are extracted form the spectra nuclei with one valence nucleon or are treated as free parameters; phonon energies are derived from neighboring doubly-even nuclei. The particle vibration coupling constant is treated as a free parameter.

Solution method:
Using a basis of uncoupled particle-phonon states, the Hamiltonian is constructed and then diagonalized to obtain perturbed eigenvalues and eigenvectors. The latter are used to calculate the static magnetic dipole and electric quadrupole moments and E1, M1, E2, M2, and E3, M3 transition rates.

Restrictions:
Up to 10 intrinsic states may be included and up to 5 quadrupole phonon states, although there will rarely be any justification for going beyond N=3. Anharmonic two-phonon states may be included at the user's option.

Running time:
A single run will typically use about 60 seconds of CPU time on a DEC-20