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 Nm have been determined from fits to the cumulative number of levels. The level numbers Nc associated with the cutoff energies Uc, 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

Filename Contents
budapest.readme Readme for budapest_levels.dat and budapest_cumulative.dat
budapest_levels.dat (compressed) Actual data, ASCII  file with 132-character lines, about 5 Mbytes (uncompressed) in size;  first version: 16 November 1996, last modified: 15 September 1997
budapest_cumulative.dat (compressed) ASCII table of the fitted cumulative numbers, cutoff energies and level density parameters;  first version: 16 November 1996, last modified: 15 September 1997



OTHER FILES

Filename Contents
all.readme Readme for all files listed below
beijing.readme Readme for beijing.dat
beijing.dat (compressed) File of discrete level schemes and branching ratios
bologna.readme Readme for bologna.dat
bologna.dat (compressed) Bologna nuclear level file
jaeri.readme Readme for jaeri.dat
jaeri.dat (compressed) JAERI file of level schemes
livermore.readme Readme for livermore.dat
livermore.dat   Livermore biological file of discrete levels (A < 18)
obninsk.readme Readme for obninsk_branchings.dat and obninsk_levels.dat
obninsk_branchings.dat (compressed) Obninsk file of experimental branchings
obninsk_levels.dat (compressed) Obninsk file of schemes of experimental discrete levels