Elsevier Science Home
Computer Physics Communications Program Library
Full text online from Science Direct
Programs in Physics & Physical Chemistry
CPC Home

[Licence| Download | New Version Template] acfn_v1_0.gz(23 Kbytes)
Manuscript Title: A packed storage program for angular momentum coupling coefficients.
Authors: C.F. Vermaak, D. Vermaak, H.G. Miller
Program title: CLEBSCH-GORDAN STORAGE
Catalogue identifier: ACFN_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 31(1984)41
Programming language: Fortran.
Computer: CDC 750.
Operating system: CDC NOS 1.4 552/552.
RAM: 3K words
Word size: 60
Keywords: General purpose, Rotation group, 3-j, Clebsch-gordan Coefficient.
Classification: 4.1.

Subprograms used:
Cat Id Title Reference
ABMA_v1_0 GEOMETRICAL COEFFICIENT CPC 1(1970)337

Revision history:
Type Tit le Reference
correction 000A CORRECTION 06/02/85 See below

Nature of problem:
In order to avoid the recalculation of angular momentum coupling coefficients required in certain types of quantum mechanical calculations, an efficient packed storage mode has been devised. Structured arrays are constructed in which the storage requirements have been reduced by making use of the symmetry properties of the Wigner 3-j coefficients. Rapid retrieval of a 3-j coefficient is possible without searching through the arrays. A separate return enables the user to obtain the appropriate Clebsh-Gordan coefficient.

Solution method:
A five-dimensional structured array with variable bounds.

Restrictions:
The range of the values of j1 and j2 in the Wigner 3-j coefficient
{ j1 j2 j3 }
{ m1 m2 m3 }
are assumed to be equal. All allowed values of m1 and m2 are considered.

CORRECTION SUMMARY
Manuscript Title: A packed storage program for angular momentum coupling coefficients. (C.P.C. 31(1984)41).
Authors: C.F. Vermaak, D. Vermaak, H.G. Miller
Program title: 000A CORRECTION 06/02/85
Catalogue identifier: ACFN_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 36(1985)337
Classification: 4.1.