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48-Cd-106 UA,ANL,+ EVAL-AUG94 J.McCabe, A.B. Smith, +
DIST-JAN09 20090105
----JEFF-311 MATERIAL 4825
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
*************************** JEFF-3.1.1 *************************
** **
** Original data taken from: JEFF-3.1 **
** **
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***************************** JEFF-3.1 *************************
** **
** Original data taken from: JEFF-3.0 **
** **
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***************************** JEFF-3.0 ***********************
DATA TAKEN FROM :- ENDF/B-VI rel.4 (DIST-APR94 REV3-AUG96)
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ENDF/B-VI MOD 4 Revision (R.Q. Wright, ORNL, V. McLane, NNDC,
August, 1996)
. File 1 comments added
****************************************************************
ENDF/B-VI MOD 3: (J. McCabe, A.B. Smith, J.W. Whalen, ANL,
August, 1994)
Comprehensive neutronic evaluated files for the naturally-
occurring isotopes of cadmium are deduced from the experimental
data and nuclear models. Particular attention is given to those
processes relevant to fuel-cycle and fisson-product applications.
Some discrepancies with the previous evaluation are very large
(e.g., as much as 100%), and the differences have the potential
for a pronounced effect on applications usage. The present files
are comprehensive, including many important processes that are
not represented in the previous evaluation. See Ref.1 for
complete documentation.
The resonance region evaluation was carried over from the
previous evaluation, see following.
REFERENCE
1. J. McCabe, A.B. Smith, J.W. Whalen, Report ANL/NDM-129 (1993)
Argonne National Laboratory.
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ENDF/B-VI MOD 2 Revision (R.Q. Wright, ORNL, December, 1991)
See ANS Transactions, volume 68, part A, page 468.
The previous evaluation carried over from ENDF/B-V, did not
have resolved resonance parameters or an unresolved resonance
range.
Resolved resonance range (1.0e-5 ev to 6.0 kev)
-----------------------------------------------
The MLBW formalism is used for this evaluation. The highest
energy resonance included is 5881 eV. The resolved resonance
parameters are taken from Ref. 1 and from table 2 of Ref. 2.
In Ref. 1 there is a gap between about 700 and 2500 eV where no
resolved resonance data is available. 14 fictitious s-wave res-
onances were inserted, starting at 755 eV and ending at 2497 eV.
Above 2500 eV, 25 resonances were assigned as s-wave and 27 were
were assigned as p-wave. Also 4 fictitious s-wave resonances
were inserted above 6 keV. For s-wave resonances the average
gamma width is 0.1612 eV; the average level spacing is 142.6 eV;
The s-wave strength function is 0.834E-4. The p-wave capture
width is set to 0.175 eV for all 27 resonances.
Unresolved resonance range (6.0 to 100 kev)
-------------------------------------------
The unresolved resonance range fit is based on the average
capture cross sections from ref. 3.
The unresolved resonance parameters are based on:
D0 = 110 eV, S0 = 1.0, S1 = 5.0, AND S2 = 0.5
D1 = 42 eV, SG0 = 14.09, SG1 = 41.67
File 3:
--------------
Total, elastic, and capture are set to zero in the resolved
and unresolved resonance ranges (1.0E-5 eV to 100 keV).
2200 m/s capture cross section
(from resonance parameters) = 1.12 barns
Computed resonance integral = 14.20 barns
REFERENCES
----------
1. S.F. Mughabghab, M. Divadeenam, and N.E. Holden, Neutron
Cross Sections, vol 1A, Academic Press, New York (1981).
2. Musgrove et al., Neutron-capture resonance parameters and
cross sections for the even-A isotopes of cadmium, J. of
Physics, part G 4 (5), 771 (1978).
3. Musgrove et al., 1978 Harwell Conf. on Neutron Physics and
Nucl. Data, table V, page 449. (1978). Values are mult. by
a factor of 0.985 (see Nucl.Sci.Eng. 82, p. 230).
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