BEIJING.readme
Average neutron resonance parameters and other data
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FILE WITH DATA RELATIVE TO LEVEL DENSITY (CENPL.NLD.LRD-2)
Huang Zhongfu
Physics Department, Guangxi University, Nanning Guangxi
Su Zongdi Sun Zhengjun
China Institute of Atomic Energy, P.O.Box 275-41, Beijing
16 July 1996
The file, containing the data relative to the level density LRD-2, is the 2-nd
version of the file of Nuclear Level Density SubLibrary (NLD) of the Chinese
Evaluated Nuclear Parameter Library( CENPL), yielding its full original name
CENPL.NLD.LRD-2. The file was updated in 1996.
Contents
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The file contains 4 kinds of data relative to the level density:
- average neutron level spacing Do,
- neutron strength function So,
- radiative capture width GWo for s-wave neutron at the neutron separation
energy Bn, and
- cumulative number No of low lying levels up to the cut off excitation
energy Um.
This file contains Do and No values of 344 nuclides, So values of 309 ones
ranging from 15-N to 254-Es, as well as the GWo values of 208 ones ranging
35-S to 250-Bk . Most Do and So values (for 309 nuclides), all No values were
reevaluated by us in 1996 [1].The other Do values of 35 nuclides were taken
from Refs. [2-12], GWo values were taken from BNL-325 [5].
Format
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Each record of this file contains Z, EL, A, J, Bn, Ei, Nr, Do, dDo, So, dSo,
GWo, Um and No:
Z : Atomic number of compound nucleus, I4.
EL : Element symbol of compound nucleus, A3.
A : Mass number of compound nucleus, I4.
J : Spin of the ground state for target nucleus, A6.
Bn : Neutron separation energy of compound nucleus in MeV, F7.3.
Ei : Neutron energy internal to determine the average level spacing in
keV, E10.3.
Nr : Resonance number in neutron energy internal Ei, I4.
Do : s-wave average neutron level spacing at Bn for compound nucleus
in keV, E9.2.
dDo: Deviation of Do in keV, E9.2.
So : s-wave average neutron strength function at Bn for compound
nucleus in E-4 eV, F5.2.
dSo: Deviation of So in E-4 eV, F5.2.
GWo: s-wave average radiative capture width at Bn for compound nucleus
in keV, E9.2.
Um : Cut off excitation energy to get the cumulative number of low-lying
levels in MeV, F5.2.
No : Cumulative number of low-lying levels up to Um, I4.
References
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[1] Huang Zhongfu et al., "New Sets of s-Wave Average Resonance Parameters",
to be published.
[2] J. Kopecky et al., Report INDC(NDS)-238(IAEA, Vienna 1990).
[3] J. A. Harver et al., Phys. Rev., C28(1983)24.
[4] W. Dilg et al., Nucl. Phys., A217(1973)269.
[5] S. F. Mughabghab et al., "Neutron Cross Section",Part A(1981) and
Part B(1984).
[6] S. Iijima et al., J. Nucl. Sci. Tech., 21(1984)10.
[7] S. Raman et al., Phys. Rev., C23(1981)2794.
[8] T. Asami et al., Report JAERI-M 86-086 (JAERI, Tokai-mura 1986).
[9] V. M. Bychkov et al., Report INDC(CCP)-320 (IAEA, Vienna 1990).
[10] J. L. Cook et al., Aust. J. Phys., 20(1967)477.
[11] G. D. James et al., "Nuclear Fission and Neutron-Induced Fission
Cross Sections", P.174, in 1981.
[12] G. V. Antsipov et al., Report INDC(CCP)-239 (IAEA, Vienna 1989).