DISCRETE   LEVEL   SCHEMES

The discrete level schemes segment has been created by the Budapest group using the Evaluated Nuclear Structure Data File, ENSDF as a source.  The segment contains 96,834 levels and 105,423 gamma rays for 2,585 nuclei, with their characteristics such as energy, spin, parity, half-life as well as gamma-ray energy and branching percentage. Isomer flags for half-lives longer than 1 s have been introduced.  For those 1,277 nuclei having at least ten known levels the cutoff level numbers N_m have been determined from fits to the cumulative number of levels. The level numbers N_c associated with the cutoff energies U_c, corresponding to the upper energy limit of levels with unique spin and parity, have been included for each nuclide.  The segment has the form of an ASCII file which follows the extended ENEA Bologna convention.

For the RIPL Starter File the Budapest file is recommended because it is most complete, up-to-date, and also well documented.  Moreover, the cutoff energies have been determined in a consistent way, giving also hints about basic level density parameters. The recommended files are budapest_levels.dat and budapest_cumulative.dat.

As alternative choices, the libraries from Beijing, Bologna, JAERI, Obninsk and Livermore may also be used for special applications.

The directory is comprised of the subdirectories RECOMMENDED and OTHER_FILES:
(NOTE: Use GZIP, WinZip or MacGzip to decompress files specified as "compressed".)

RECOMMENDED

OTHER FILES