OBNINSK.readme
Schemes of Experimental Discrete Levels and Branchings
(Provided by A.V. Ignatyuk, LEVELS: 28 October 1994
BRANCHINGS: 18 December 1997)
OBNINSK_LEVELS.DAT
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The first version of the Schemes of Experimental Discrete
Levels (SEDL) was compiled by the Russian Nuclear Data Center in
1989 [1]. The more complete second version of SEDL was prepared on
the basis of the approved levels of the ENSDF file in 1993 [2]. SEDL
contains the energies, spins and parities of levels for 1170 nuclei
at the mass region of 21<A<250.
SEDL was widely used for estimation of the low-lying level densi-
ties [3] and preparation of numerous discrete level schemes for
statistical calculations of the neutron induced threshold reactions.
The major results of such calculations were included in the
Activation Data Library (ADL-3) [4].
Data for each nucleus are written in the following form:
1-st line in format(I3,1X,I3,A2,I3) identifies the number of levels
included, the element number, the element symbol, and the
mass number;
other lines in format(5(F6.4,2F4.1,I2) contain the level energy, the
minimal and maximal values of the level spin, and the level
parity. The value equal to -1.0 for spins means that the spin
value is not identified. Zero for parities means nonidentified
values.
OBNINSK_BRANCHINGS.DAT
----------------------
This file contains available experimental data on the branching
ratios for gamma-ray transitions between low-lying discrete levels
(the previous name of the file was SEDL-RAD [2]). Data for 550
nuclei are included that were used for statistical calculations of
the isomer production cross sections for Activation Data Library
(ADL-3) [4].
Data for each nucleus are written in the following form:
1-st line in format(I8,I5) identifies the nucleus (1000Z+A) and the
number of levels included;
2-nd line in format(I6,3X,F9.6,F6.1,18X,I6) indicates the level number
starting from the first one for the ground state, the level energy,
the parity (+/-) and spin of the level, the number of gamma-ray
transitions from this level;
other lines in format(6X,2I6,F12.6) contain the number of a transition,
the level number of the residual level and the branching ratio for
the corresponding gamma-transition.
The fields outside the formats indicated above were used in SEDL-
RAD-file for some additional information required by some processing
codes. Such information has no any physical meaning and should not be
taken into consideration.
References
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1. O.T. Grudzevich, A.V. Zelenetsky, A.B. Pashchenko. Preprint FEI-2209,
Obninsk, 1989.
2. O.T. Grudzevich, A.V. Zelenetsky, A.B. Pashchenko. Reference Nuclear
Parameter Library. Preprint FEI-2306, Obninsk, 1993.
3. A.V.Ignatyuk et al. Contribution to the first RIPL CRP, Cervia, 1994.
4. O.T. Grudzevich, A.V. Zelenetsky, A.V.Ignatyuk, A.B. Pashchenko.
Catalog of ADL-3. VANT, Ser. Nuclear Constants, 1993, is. 3-4.