Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] abkb_v1_0.gz(11 Kbytes)|
|Manuscript Title: Coefficients of fractional parentage in j-j coupling in the isospin representation.|
|Authors: L.B. Hubbard|
|Program title: JJTCFP|
|Catalogue identifier: ABKB_v1_0|
Distribution format: gz
|Journal reference: Comput. Phys. Commun. 1(1970)225|
|Programming language: Fortran.|
|Computer: IBM-360/75, IBM 91.|
|Operating system: 0S360.|
|RAM: 43K words|
|Word size: 32|
|Keywords: Nuclear physics, Cfp, Fractional parentage, Angular momentum, Wave function, J-j coupling.|
Nature of problem:
The program JJTCFP evaluates the coefficients of fractional parentage, c.f.p., in the j-j coupling scheme for eigenstates of seniority, i-spin and total angular momentum. This program is applicable to any shell and can be used for fermions of only one type such as electrons.
The program JJTCFP uses a recursion relation to find the n-(n+1) c.f.p. from a table of (n-1)-n c.f.p. As a result, the program is not suitable as a subroutine, but could be used in an overlaid configuration.
This program is directly applicable to any j-j shell in the i-spin formalism or in maximum i-spin only. However, the dimension of the arrays must be increased if the program is to be used near the center of the shells for shells having j>=7/2.
External sorting of output from one stage is required before it is used as input to the next stage.
The sample output required less than one second on the IBM-360/91; compile time is a few seconds. The j=7/2 4-5 c.f.p. table (nearly 10000 c.f.p., about half of which were zero) required 2 minutes of execution on the same machine.
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