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Manuscript Title: Nuclear decay scheme construction based on qualitative coincidences.
Authors: L. Hlavaty
Program title: SMUDLA
Catalogue identifier: AAPB_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 19(1980)197
Programming language: Fortran.
Computer: EC 1040.
Operating system: OS/ES 4.OM1-MVT.
RAM: 270K words
Word size: 8
Keywords: Nuclear physics, Nuclear scheme, Energy level, Gamma transition, Gamma coincidence, Heavy ion, Activity detection.
Classification: 17.6, 17.7.

Nature of problem:
The program constructs possible variants of nuclear decay schemes from the knowledge of experimentally determined gamma transitions and their coincidences.

Solution method:
Coinciding transitions having their corresponding cross-overs are found. Afterwards more complex parts of decay scheme fragments with a given number of levels are constructed and they are tested for agreement with experimental information. The number of levels of the parts is gradually increased for as long as it is possible to find parts of a decay scheme conforming to experimental data. Fragments with the highest number of levels are finally printed in graphical form.

The program in its present form can process 300 transitions and 2000 coincidences and it constructs schemes with maximally 30 levels. These restrictions may be changed according to the computer memory. The range of working field needed for scheme building may be adjusted, too. However, for more complicated schemes results might be incomplete if the working field is too short, while the running time may considerably increase if the field is too large.

Running time:
The running times vary considerably with the complexity of the resultant scheme. They range between a few seconds for less than 10 levels and two hours for more than 25 levels.