Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] acre_v1_0.gz(6 Kbytes)|
|Manuscript Title: Vector coupling coefficients as products of prime factors.|
|Authors: R.McD. Dodds, G. Wiechers|
|Program title: COEF|
|Catalogue identifier: ACRE_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 4(1972)268|
|Programming language: Fortran.|
|Computer: ICL 1901A.|
|Operating system: ICL AUTOMATIC OPERATOR.|
|RAM: 14K words|
|Word size: 24|
|Keywords: Atomic physics, Nuclear physics, Vector coupling Coefficient, Rotation group, Clebsch-Gordan Coefficient, Racah coefficient, Integer arithmetic, General purpose.|
Nature of problem:
The program computes 3j-symbols, 6j-symbols and rotation matrices (special cases) and expresses the result as a product of powers of prime numbers.
A set of subroutines is given to generate prime numbers, to express a given integer as a product of prime numbers and to carry out addition, subtraction, multiplication and division of such products, always leaving the result in the form of a product of prime numbers.
The time depends on the magnitude of the arguments of the coefficients, and is between 2 and 10 s. Running time is greatly reduced after the first few coefficients have been calculated.
|Disclaimer | ScienceDirect | CPC Journal | CPC | QUB|