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Manuscript Title: Computation of cross sections and polarizations for nuclear
reactions, in which only spin 1/2 particles are involved. | ||

Authors: P. Heiss | ||

Program title: S 1/2 PARTICLE CS AND POL | ||

Catalogue identifier: ABGK_v1_0Distribution format: gz | ||

Journal reference: Comput. Phys. Commun. 4(1972)371 | ||

Programming language: Fortran. | ||

Computer: IBM 370/165. | ||

Operating system: OS. | ||

RAM: 11K words | ||

Word size: 32 | ||

Keywords: Nuclear physics, M-matrix, Phase shifts, Nuclear reactions, Cross sections, S-matrix, Polarization. | ||

Classification: 17.8. | ||

Nature of problem:Both for a phase shift analysis and for reaction calculations one needs to relate cross sections, polarization values etc. on the one hand and S-matrix elements in the usual lsJ representation on the other. For general cases this calculation requires great computational effort. For reactions in which only spin 1/2 particles are involved this effort can be considerably reduced, by the explicit calculation of the M-matrix. | ||

Solution method:In the special case under discussion, relatively simple relations between S-matrix elements and M-matrix elements can be derived. From M- matrix elements, cross sections and polarizations can be obtained in a simple way. Hence, the following program requires only a small amount of high speed storage space and runs relatively fast. | ||

Restrictions:The program is restricted to a maximum angular momentum of L=3. If higher partial waves are included, dimensions of certain arrays have to be increased. These arrays are specified in section 3 of the "long write-up". | ||

Running time:Half a second per energy value. |

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