BEIJING.readme
Fission Barrier Parameters
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Original file name: CENPL-FBP, version 1
Zhang limin, Ge Zhigang, Su Zongdi
China Nuclear Data Centre, CIAE
P.O. Box 275(41), Beijing 102413
P.R. CHINA
15 August 1992
Contents
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This data file, which constitutes a sublibrary of the Chinese Evaluated
Nuclear Parameter Library (CENPL), consists of three sets of the Fission
Barrier Parameters (FBP). They are listed in Tables 1, 2 and 3, respectively.
1. Table 1 includes the fission barrier parameters recommended by J.E. Lynn
[1] in 1974 from analysis of the neutron cross sections by using Hauser-
Feshbach theory with the double-humped barrier for 50 actinide nuclei ranging
from 229-Th to 255-Cf.
2. Table 2 lists the fission barrier parameters and their deviations estimated
by B.B. Back et al. for 46 actinide nuclei ranging from 229-Th to 253-Cf.
B.B. Back et al.[2,3] had measured the fission probability distributions of
several fission reactions induced by direct reaction and analyzed by using
a statistical model involving resonant penetration of the double-humped
fission barrier in 1974 .
3. Table 3 includes the fission barrier parameters recommended by T. Ohsawa [4]
in 1988 for 24 actinide nuclei ranging from 232-Pa to 253-Cf. The barrier
heights were obtained from the fission cross section analysis based on the
double-humped barrier concept and by best use of information available on
the fission barriers to reduce the number of adjustable parameters. The
barrier curvature parameters were taken three constants for odd-odd ,
odd-A and even-even nuclei respectively, which were determined by fission
isomer half-lives and fission probability data.
Format
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Each record of the file contains Z, EL, A, V1, DV1, W1,DW1, V2, DV2, W2,
DW2, REF and No, as defined below:
Z : charge number, column 1-3
EL : element symbol, column 4-6
A : mass number, column 7-10
V1 : height of the first barrier, column 14-19
DV1 : deviation of V1, column 20-23
W1 : curvature of the first barrier, column 27-32
DW1 : deviation of W1, column 33-36
V2 : height of the second barrier, column 40-45
DV2 : deviation of V2, column 46-49
W2 : curvature of the second barrier, column 53-58
DW2 : deviation of W2, column 59-62
REF : reference, column 65-69
No : order number, column 73-74
References
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[1] J.E. Lynn, Report AERE-R7468, 1974
[2] B.B. Back et al., Phys. Rev. C9, 1924(1974)
[3] B.B. Back et al., Phys. Rev. C10, 1948(1974)
[4] T. Ohsawa, IAEA-TECDOC-483, 1988, p.134