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Manuscript Title: RITSSCHIL: a new program for shell-model calculations. | ||

Authors: D. Zwarts | ||

Program title: RITSSCHIL | ||

Catalogue identifier: AADA_v1_0Distribution format: gz | ||

Journal reference: Comput. Phys. Commun. 38(1985)365 | ||

Programming language: Fortran. | ||

Computer: CDC 175-100. | ||

Operating system: NOS/BE 1.5. | ||

Program overlaid: yes | ||

RAM: 47K words | ||

Word size: 60 | ||

Peripherals: disc. | ||

Keywords: Shell model, Nuclear physics, Structure, Second quantization, General reduction Formula. | ||

Classification: 17.19. | ||

Nature of problem:A new program for nuclear (or atomic) shell-model calculations is described. In comparison with other presently available shell-model codes, the new program, called RITSSCHIL, can treat a larger variety of operators and it is more flexible. The reduced matrix elements of tensorial shell-model operators are calculated in a multi-shell space for nuclear (or atomic) shell-model states. | ||

Solution method:With the use of the general reduction formula the matrix elements are expanded in terms of single-shell matrix elements and the elementary matrix elements that describe the operator. | ||

Restrictions:The program is suitable for all tensorial shell-model operators. The number of active shells is limited only by a user. The order in which the active shells are coupled can be defined by input cards. | ||

Running time:The running time depends strongly on the number of active shells and on the dimensions of the computed matrices. For the test run on a CDC 175- 100 computer 31 s of CPU time was required. |

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