Abstract

For several years, the Nuclear Data Project has been using a standard computer-readable format 1 to organize the results of data evaluations published in Nuclear Data Sheets. Adopted values for level energies, spins, half-lives, radiation properties, and spectroscopic factors are recorded in standard blocks of information, which are then filed onto indexed direct-access storage. The resulting Evaluated Nuclear Structure Data File (ENSDF) is then available as a standard source of nuclear structure information. 2 Computer organization of selected data into pages has been a feature of Nuclear Data Sheets since 1975. As an illustration of the power and potential usefulness of the ENSDF system, we present a collection of nuclear levels for which the spontaneous fission has been studied. The values tabulated have appeared in recent issues of Nuclear Data Sheets. 3 The selection of values and arrangement into a table has been done completely automatically. We welcome comments and criticisms about the form or content of this table.

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