48-Cd-111
48-CD-111 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-SEP90 REV2-NOV93
----JENDL-3.2 MATERIAL 4840
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
84-10 EVALUATION FOR JENDL-2 WAS MADE BY JNDC FPND W.G./1/
90-03 MODIFICATION FOR JENDL-3 WAS MADE/2/.
93-12 JENDL-3.2 WAS MADE BY JNDC FPND W.G.
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(2,151) RESOLVED AND UNRESOLVED RESONANCE PARAMETERS
(3,102) RENORMALIZATION TO RECENT EXPERIMENT
(3,2), (3,4), (3,51-91), (4,51-91)
EFFECTS OF RENORMALIZATION OF CAPTURE
***********************************************************
MF = 1 GENERAL INFORMATION
MT=451 COMMENTS AND DICTIONARY
MF = 2 RESONANCE PARAMETERS
MT=151 RESOLVED AND UNRESOLVED RESONANCE PARAMETERS
RESOLVED RESONANCE REGION (MLBW FORMULA) : BELOW 1.8 KEV
RESONANCE PARAMETERS OF JENDL-2 WERE MODIFIED FOR JENDL-3.
FOR JENDL-2, EVALUATION WAS MADE ON THE BASIS OF EXPERIMEN-
TAL DATA OF LIOU ET AL./3/ AND WASSON AND ALLEN/4/. THE
AVERAGE RADIATION WIDTH WAS ASSUMED TO BE 0.102 EV/3/.
SCATTERING RADIUS OF 6.5 FM WAS ASSUMED ON THE BASIS OF
SYSTEMATICS OF MEASURED VALUES.
FOR JENDL-3, THE LOWEST TWO P-WAVE RESONANCES WERE ADDED
ACCORDING TO THE DATA BY ALFIMENKOV ET AL./5/ TOTAL SPIN J
OF SOME RESONANCES WAS TENTATIVELY ESTIMATED WITH A RANDOM
NUMBER METHOD. PARAMETERS OF A NEGATIVE RESONANCE WERE
MODIFIED SO AS TO REPRODUCE THE THERMAL CAPTURE AND ELASTIC
SCATTERING CROSS SECTIONS GIVEN BY MUGHABGHAB ET AL./6/
FOR JENDL-3.2, THE CAPTURE DATA MEASURED AT ORERA OF ORNL
WERE RENORMALIZED (FACTOR=1.208)/7/. THE NEUTRON AND/OR
RADIATION WIDTH WERE REVISED TO REPRODUCE THE NORMALIZED
CAPTURE AREA FOR EACH RESONANCE ABOVE 2.76 EV.
UNRESOLVED RESONANCE REGION : 1.8 KEV - 100 KEV
THE SAME PARAMETER VALUES AS JENDL-2 WERE USED AS INITIAL
VALUES. THEN THE PARAMETERS WERE ADJUSTED TO REPRODUCE THE
CAPTURE CROSS SECTION CALCULATED WITH CASTHY /8/ (SEE MF=3,
MT=102) ABOVE 15 KEV AND THOSE MEASURED BY MUSGROVE ET AL./9/
BELOW 15 KEV. THE EFFECTIVE SCATTERING RADIUS WAS OBTAINED
FROM FITTING TO THE CALCULATED TOTAL CROSS SECTION AT 100 KEV.
TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:
S0 = 0.450E-4, S1 = 3.900E-4, S2 = 0.530E-4, SG = 101.E-4,
GG = 0.160 EV, R = 5.763 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 29.013 -
ELASTIC 5.074 -
CAPTURE 23.939 49.9
MF = 3 NEUTRON CROSS SECTIONS
BELOW 100 KEV, RESONANCE PARAMETERS WERE GIVEN.
ABOVE 100 KEV, THE SPHERICAL OPTICAL AND STATISTICAL MODEL
CALCULATION WAS PERFORMED WITH CASTHY/8/, BY TAKING ACCOUNT OF
COMPETING REACTIONS, OF WHICH CROSS SECTIONS WERE CALCULATED
WITH PEGASUS/10/ STANDING ON A PREEQUILIBRIUM AND MULTI-STEP
EVAPORATION MODEL. THE OMP'S FOR NEUTRON GIVEN IN TABLE 1 WERE
DETERMINED TO REPRODUCE THE CD-NATURAL TOTAL CROSS SECTIONS
MEASURED BY FOSTER AND GLASGOW/11/, POENITZ AND WHALEN/12/ AND
SO ON. THE OMP'S FOR CHARGED PARTICLES ARE AS FOLLOWS:
PROTON = PEREY/13/
ALPHA = HUIZENGA AND IGO/14/
DEUTERON = LOHR AND HAEBERLI/15/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/16/
PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT
AND CAMERON/17/ WERE EVALUATED BY IIJIMA ET AL./18/ MORE
EXTENSIVE DETERMINATION AND MODIFICATION WERE MADE IN THE
PRESENT WORK. TABLE 2 SHOWS THE LEVEL DENSITY PARAMETERS USED
IN THE PRESENT CALCULATION. ENERGY DEPENDENCE OF SPIN CUT-OFF
PARAMETER IN THE ENERGY RANGE BELOW E-JOINT IS DUE TO GRUPPELAAR
/19/.
MT = 1 TOTAL
SPHERICAL OPTICAL MODEL CALCULATION WAS ADOPTED.
MT = 2 ELASTIC SCATTERING
CALCULATED AS (TOTAL - SUM OF PARTIAL CROSS SECTIONS).
MT = 4, 51 - 91 INELASTIC SCATTERING
SPHERICAL OPTICAL AND STATISTICAL MODEL CALCULATION WAS
ADOPTED. THE LEVEL SCHEME WAS TAKEN FROM REF./20/.
NO. ENERGY(MEV) SPIN-PARITY
GR. 0.0 1/2 +
1 0.2454 5/2 +
2 0.3419 3/2 +
3 0.3960 11/2 -
4 0.4166 7/2 +
5 0.6200 5/2 +
6 0.7000 3/2 +
7 0.7540 5/2 +
8 0.8665 3/2 +
9 1.0200 1/2 +
10 1.1300 5/2 +
11 1.1900 1/2 +
LEVELS ABOVE 1.33 MEV WERE ASSUMED TO BE OVERLAPPING.
MT = 102 CAPTURE
SPHERICAL OPTICAL AND STATISTICAL MODEL CALCULATION WITH
CASTHY WAS ADOPTED. DIRECT AND SEMI-DIRECT CAPTURE CROSS
SECTIONS WERE ESTIMATED ACCORDING TO THE PROCEDURE OF BENZI
AND REFFO/21/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (1.032E-02) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 664 MILLI-BARNS AT 90
KEV MEASURED BY MUSGROVE ET AL./9/
MT = 16 (N,2N) CROSS SECTION
MT = 17 (N,3N) CROSS SECTION
MT = 22 (N,N'A) CROSS SECTION
MT = 28 (N,N'P) CROSS SECTION
MT = 32 (N,N'D) CROSS SECTION
MT =103 (N,P) CROSS SECTION
MT =104 (N,D) CROSS SECTION
MT =105 (N,T) CROSS SECTION
MT =107 (N,ALPHA) CROSS SECTION
THESE REACTION CROSS SECTIONS WERE CALCULATED WITH THE
PREEQUILIBRIUM AND MULTI-STEP EVAPORATION MODEL CODE PEGASUS.
THE KALBACH'S CONSTANT K (= 107.8) WAS ESTIMATED BY THE
FORMULA DERIVED FROM KIKUCHI-KAWAI'S FORMALISM/22/ AND LEVEL
DENSITY PARAMETERS.
FINALLY, THE (N,P) AND (N,ALPHA) CROSS SECTIONS WERE
NORMALIZED TO THE FOLLOWING VALUES AT 14.5 MEV:
(N,P) 50.00 MB (RECOMMENDED BY FORREST/23/)
(N,ALPHA) 4.52 MB (SYSTEMATICS OF FORREST/23/)
MT = 251 MU-BAR
CALCULATED WITH CASTHY.
MF = 4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
LEGENDRE POLYNOMIAL COEFFICIENTS FOR ANGULAR DISTRIBUTIONS ARE
GIVEN IN THE CENTER-OF-MASS SYSTEM FOR MT=2 AND DISCRETE INELAS-
TIC LEVELS, AND IN THE LABORATORY SYSTEM FOR MT=91. THEY WERE
CALCULATED WITH CASTHY. FOR OTHER REACTIONS, ISOTROPIC DISTRI-
BUTIONS IN THE LABORATORY SYSTEM WERE ASSUMED.
MF = 5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS WERE CALCULATED WITH
PEGASUS FOR INELASTIC SCATTERING FROM OVERLAPPING LEVELS AND FOR
OTHER NEUTRON EMITTING REACTIONS.
TABLE 1 NEUTRON OPTICAL POTENTIAL PARAMETERS
DEPTH (MEV) RADIUS(FM) DIFFUSENESS(FM)
---------------------- ------------ ---------------
V = 50.01-0.5528E R0 = 5.972 A0 = 0.56
WS = 8.165 RS = 6.594 AS = 0.44
VSO= 5.261 RSO= 5.97 ASO= 0.267
THE FORM OF SURFACE ABSORPTION PART IS DER. WOODS-SAXON TYPE.
TABLE 2 LEVEL DENSITY PARAMETERS
NUCLIDE A(1/MEV) T(MEV) C(1/MEV) EX(MEV) PAIRING
---------------------------------------------------------------
46-PD-107 1.916E+01 6.110E-01 6.467E+00 6.507E+00 1.350E+00
46-PD-108 1.790E+01 6.460E-01 8.844E-01 7.957E+00 2.600E+00
46-PD-109 2.071E+01 6.030E-01 1.194E+01 6.925E+00 1.350E+00
46-PD-110 1.880E+01 6.300E-01 1.215E+00 7.897E+00 2.490E+00
47-AG-108 1.671E+01 5.760E-01 1.221E+01 3.609E+00 0.0
47-AG-109 1.650E+01 6.300E-01 2.761E+00 5.709E+00 1.250E+00
47-AG-110 1.791E+01 5.900E-01 2.444E+01 4.282E+00 0.0
47-AG-111 1.955E+01 5.810E-01 6.505E+00 5.835E+00 1.140E+00
48-CD-109 1.812E+01 6.120E-01 3.856E+00 6.132E+00 1.360E+00
48-CD-110 1.750E+01 6.300E-01 5.212E-01 7.482E+00 2.610E+00
48-CD-111 1.874E+01 5.930E-01 3.762E+00 6.000E+00 1.360E+00
48-CD-112 1.797E+01 6.190E-01 6.327E-01 7.351E+00 2.500E+00
---------------------------------------------------------------
SPIN CUTOFF PARAMETERS WERE CALCULATED AS 0.146*SQRT(A)*A**(2/3).
IN THE CASTHY CALCULATION, SPIN CUTOFF FACTORS AT 0 MEV WERE
ASSUMED TO BE 4.636 FOR CD-111 AND 3.236 FOR CD-112.
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