Keyword: COULOMFILE
HFODD.COU = FILCOU
CHARACTER*68 file name of the file containing auxiliary data for a faster calculation of the Coulomb potential. Must start at the 13-th column of the data line. Parameters NUMCOU, NUMETA, and FURMAX which define the calculations of the direct Coulomb potential (see Section 5 of I and Section 3.5 of II) are usually kept unchanged for the whole series of calculations in one region of nuclei. Therefore, many Coulomb auxiliary results can be calculated only once, and stored in the file FILCOU. Handling of this file is determined by the input parameters ICOULI and ICOULO.
Keyword: COULOMSAVE
0,0 = ICOULI, ICOULO
Input parameters ICOULI and ICOULO determine actions pertaining to reading and/or writing of the Coulomb file FILCOU, according to the following table:
| ICOULI | ICOULO | Action |
| 0 | 0 | neither read nor write the Coulomb file |
| 1 | 0 | read, but do not write the Coulomb file |
| 0 | 1 | do not read, but write the Coulomb file |
| 1 | 1 | use automated handling of the Coulomb file |
The default values of ICOULI=ICOULO=0 ensure that whenever this new option is not used, the code HFODD (v1.75r) behaves as that in version (v1.60r). However, unless it is required by special circumstances, a use of the automated handling of the Coulomb file (ICOULI=ICOULO=1) is recommended. Within the automated mode, the code checks whether the Coulomb file exists, and whether it contains data which match the current values of the input parameters NUMCOU, NUMETA, and FURMAX. If this is the case, the code reads the data from the Coulomb file. If this is not the case, the code calculates the Coulomb auxiliary results and stores them in the Coulomb file FILCOU. In the automated mode, the user is informed by appropriate messages printed on the output file about what type of the action has been taken in the given run of the code.