Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] abqf_v1_0.gz(5 Kbytes)|
|Manuscript Title: A computer program for calculation of the Coriolis effect in odd-A nuclei.|
|Authors: R. Kaczarowski|
|Program title: CORIOL|
|Catalogue identifier: ABQF_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 13(1977)63|
|Programming language: Fortran.|
|Computer: CDC CYBER 73.|
|Operating system: SCOPE 3.4.1.|
|RAM: 15K words|
|Word size: 60|
|Keywords: Nuclear physics, Particle-rotation Coupling, Coriolis effect, Fitting, Energy level, Collective model.|
Nature of problem:
In recent years, many papers have been devoted to the particle-rotation coupling (Coriolis effect) in nuclei. Dramatic perturbations due to strong Coriolis coupling are observed in the rotational bands associated with high-j intrinsic states. Calculations, in which the nilsson model was extended to include Coriolis coupling and pairing interaction, in manycases successfully explain the observed peculiar structure of the rotational bands. The present program calculates the perturbed rotational energy levels. It is written as a subroutine for use with the minuit minimization program, which makes a least-squares fit to the experimental energy levels. The mixed amplitudes of the wave functions can be obtained for the final fit.
In order to take the Coriolis coupling into account, the energy matrix is constructed and diagonalized. The Jacobi diagonalization method is used repeatedly to solve the secular determinants for all spin values, simultaneously adjusting all the parameters until a least-squares fit to the experimental energy levels is obtained.
The current version is dimensioned for 13 interacting rotational bands based on single-particle states, a maximum spin I= 39/2, and 20 experimental energy levels.
The running time depends on the number of mixing bands and the number of free parameters. Therefore the required time may vary from less than one to many minutes on the CDC CYBER 73.
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