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[Licence| Download | New Version Template] aagd_v2_0.gz(18 Kbytes)
Manuscript Title: A general program to calculate atomic continuum processes using the R- matrix method.
Authors: K.A. Berrington, P.G. Burke, J.J. Chang, A.T. Chivers, W.D. Robb, K.T. Taylor
Catalogue identifier: AAGD_v2_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 8(1974)149
Programming language: Fortran.
Computer: ICL 1906A.
Operating system: GEORGE 4.
RAM: 11K words
Word size: 24
Keywords: Atomic physics, General purpose, Rotation group, Recoupling coefficient, Racah coefficient, Wigner coefficient, Fano coefficient, 3j-symbol, 6j-symbol, 9j-symbol, 12j-symbol, 15j-symbol, 18j-symbol, 21j-symbol, Angular momentum, Angular integral, Representation of three Dimensional rotation.
Classification: 4.1.

Nature of problem:
This is a new version of the program by Burke. It combines the latter with a correction by Burke and adaptations by Hibbert and Grant. The following minor modifications, which do not affect the operation of of the program materially, have also been made: (i) The real constants have been replaced by real variables which are initialized in DATA statements. This facilitates the conversion from single precision to double precision. (ii) The integer variables used for dimension checks are now initialized in the directing program instead of in SUBROUTINE NJSYM. KFL7 has been added to COMMON block IMEN to check the dimension of the J1 array. The latter was previously incorrectly checked using KFL4. In addition KFL2 and KFL5 have been increased to 100 and 200 respectively and the appropriate arrays increased. This allows more extensive runs to be carried out.