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66-Dy-164 ORNL, BNW EVAL-JUN67 WRIGHT, LEONARD, STEWART
DIST-JAN09 20090105
----JEFF-311 MATERIAL 6649
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
*************************** JEFF-3.1.1 *************************
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** Original data taken from: JEFF-3.1 **
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***************************** JEFF-3.1 *************************
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** Original data taken from: ENDF/B-VI.8 **
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ENDF/B-VI MOD 1 Revision, April 1998, R.Q. Wright (ORNL)
MF= 2 RESONANCE PARAMETERS
RESOLVED RESONANCE RANGE--
The upper limit of the resolved resonance range is increased
from 272 eV to 16 keV. The number of resolved resonances is
increased from 2 to 117. The resonance parameters are taken
from Mughabghab [26]. Mughabghab has indicated that 25 of the
resonances are possibly p-wave; these resonances have been
included as p-wave.
The first positive level is at 146.97 eV; nearly all of the
contribution (over 99 percent) to the thermal capture cross
section is from the negative level at -1.88 eV.
There are 17 resonances included above the upper cutoff of
the resolved resonance range, 16 keV.
UNRESOLVED RESONANCE RANGE 16 to 50 keV (revised)--
The following parameters are used in this range:
S0 = 1.7E-4, S1 = 1.3E-4, D0 = 188 eV,
GG = 0.114 eV, GG/D0 = 6.0638E-4,
Scattering radius, R = 7.82 fm
These parameters are based on Mughabghab [26] and RIPL [28].
Same scattering radius also used for resolved range.
MF= 3 SMOOTH CROSS SECTIONS
MT= 1 Total below 200 keV is lower in the REVISED evaluation
relative to ENDF/B-V and slightly higher from 200 keV to 2
MeV. For all dysprosium isotopes the total cross section
is based on the "eye guide" curve as given on page 546 of
McLane [29].
MT= 2 The elastic scattering cross section is revised to
reflect the changes in the total and capture cross sections.
Elastic = Total - Nonelastic
MT=102 Capture is revised above 50 keV
For the energy range 16 to 500 keV the revision is based on
the measured data of Kononov [27]. Capture above 500 keV
is much lower than the ENDF/B-V evaluation in order to join
smoothly at 500 keV.
THERMAL CROSS SECTIONS AND CAPTURE RESONANCE INTEGRAL--
The revised thermal cross sections and the resonance integral
are compared with the values given by Mughabghab [26].
2200 m/sec cross sections (barns)
Evaluation Mughabghab
total 2978.56 2969
elastic 326.93 319 +/- 10
capture 2651.63 2650 +/- 100
Capture resonance integral (barns)
Evaluation Mughabghab
342.50 340 +/- 20
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ENDF/B-VI MOD 0, February 1990 (NNDC)
ENDF/B-V MATERIAL CONVERTED TO ENDF-6 FORMAT.
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ENDF/B-V Evaluation, MAT 1031, June 1967, B.R. Leonard and
K. Stewart (BNW)
This file transfered from ENDF/B-III with no modifications.
Data modified June,1970 to conform to ENDF/B-II formats
MF= 1 GENERAL INFORMATION
MT=451 Atomic mass =163.9288 I=0 Chart of Nuclides [2].
MT=453 Radioactive decay MT=102 Strominger [3], MT=103,107
Chart of Nuclides [2].
MF= 3 SMOOTH CROSS SECTIONS
MT= 1 Total cross section 0.0001 eV to 2.229 eV calculated
by UNICORN from resonance parameters of File 2 for 0 K.
Data of Refs. [4,5,8,9,10] considered.
10 to 200 keV: Refs. [11,12,13] and Optical-Model
calculations [1] using ABACUS-2 [14]. Poor fit to data
of Stupegia [15].
200 keV to 2.5 MeV: Optical-Model calculation [1].
2.5 to 15 MeV: eye fit to data of Foster [16] elemental Dy.
MT= 2 Elastic scattering 0.0001 eV to 2.229 eV from UNICORN
calculation [1]. No Bragg effects.
10 keV to 20 MeV by subtraction of all others from total.
MT= 4 Inelastic scattering from ABACUS calculation [1]
MT= 16,17 Thresholds to 20 MeV calculated by Pearlstein [17]
MT=102 Capture 0.0001 eV to 2.229 eV calculated by UNICORN
From resonance parameters of File 2 [1].
10 keV to 20 MeV from smooth curve of Goldberg [5] through
the data of Refs. [18-21].
MT=103 n,p constructed to pass through 1.0 mb at 14 MeV [22]
MT=107 n,alpha constructed to pass through a value of 4.5 mb
at 14.8 MeV [21,23].
MF= 4 LEGENDRE POLYNOMIALS
MT= 2 20x20 transformation matrix c.m.-lab calculated [1] by
CHAD. 19 c.m. Legendre coeff 10 keV to 20 MeV calculated
from distributions of ABACUS by modified version of CHAD
[1]. No compound-elastic for E over 5 MeV.
MF= 5 SECONDARY ENERGY DISTRIBUTIONS
MT= 4 Inelastic scattering threshold to 2 MeV to 12 levels
[25] from Hauser-Feshbach ABACUS calculation [1].
2 to 20 MeV nuclear temperatures for Maxwellian [25].
MT= 16,17 Nuclear temperatures for Maxwellian [25]
thresholds to 20 MeV.
MF= 8, 9
Branching ratios for (n,g) from Hauser-Feshbach calculations
made by Fred Mann, HEDL.
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REFERENCES
1. B.R. Leonard, K.B. Stewart, PNL June 1967
2. D.T. Goldman, Chart of the Nuclides (June 1964)
3. D. Strominger, J.M. Hollander, G.T. Seaborg, Rev.Mod.Phys.
30, 585 (1958)
4. R. Sher, S. Tassan, E.V. Weinstock, A. Hellsten, Nucl.Sci.
Eng. 11, 369 (1961)
5. M.D. Goldberg et al., report BNL-325, Second Edition, Suppl.
2, Vol.2C (1966)
8. W.E. Moore, KAPL data cited in Ref.5
9. J. Brunner, F. Widder, IAEA CONF NUCL DATA PARIS(1966).
10. K. Okamoto, report JAERI-1064 (1964)
11. authors unknown, report ANL-6580 (1962) p.30
12. D.J. Hughes et al., report BNL-325, Second Ed., Suppl.1
(1960); data quoted as Har-ac1.
13. W.B. Gilboy, J.H. Towle, Nucl.Phys. 42, 86 (1963)
14. E.H. Auerbach, BNL unpublished.
15. D.C. Stupegia et al., private communication to BNL (1966);
Cited in Ref.5
16. D.G. Foster, Jr., D.W. Glasgow, PNL unpublished (1966)
17. S. Pearstein, Nucl.Sci.Eng. 23, 238 (1965) and private
communication (1966)
18. A.K. Chaubey, M.L. Sehgal, Nucl.Phys. 66, 267 (1965)
19. R.G. Wille, R.W. Fink, Phys.Rev. 118, 242 (1960)
20. A.E. Johnsrud, M.G. Silbert, H.H. Barschall, Phys.Rev. 116,
927 (1959)
21. R. Booth, W.P. Ball, M.H. MacGregor, Phys.Rev. 112, 226
(1958)
22. B.T. Kenna, F.J. Conrad, report SC-RR-229 (1966)
23. C.S. Khurana, I.M. Govil, Nucl.Phys. 69, 153 (1965)
24. R.F. Berland, report NAA-SR-11231 (1965)
25. A.M. Weinberg, E.P. Wigner, book (1958)
26. S.F. Mughabghab, Neutron Cross Sections, Vol. 1, Neutron
Resonance Parameters and Thermal Cross Sections, Part B
(Academic Press, 1984)
27. V. N. Kononov et al., Neutron-Capture Gamma-Ray Spectroscopy
and Related Topics, Symposium, September 1981, Grenoble,
France (Institute of Physics, 1982); data in EXFOR 40621.006
28. RIPL project, IAEA, Nuclear Data Project; web address:
//iaeand.iaea.or.at/ripl, select "resonances", then
"obninsk.dat".
Note: look under 66-Dy-161 (i.e., Dy-160 + neutron).
29. V. Mclane, C.L. Dunford, and P.F. Rose, Neutron Cross
Sections, Vol. 2, Academic Press (1988)
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