46-Pd-107
46-PD-107 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-SEP90 REV2-MAR93
----JENDL-3.2 MATERIAL 4640
-----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/.
93-03 JENDL-3.2 WAS MADE BY JNDC FPND W.G.
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(2,151) THE UPPER BOUNDARY OF RESOLVED RESONANCE
REGION WAS CHANGED FROM 3.525 KEV TO 1 KEV
***********************************************************
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 1.0 KEV
RESONANCE PARAMETERS OF JENDL-2 WERE REEVALUATED AS FOLLOWS:
FOR JENDL-2, RESONANCE ENERGIES WERE BASED ON THE DATA BY
MACKLIN/3/. NEUTRON WIDTHS WERE TAKEN FROM EXPERIMENTAL DATA
OF SINGH ET AL./4/ AND MACKLIN/3/. THE AVERAGE RADIATION
WIDTH OF 0.125 EV/4/ WAS ASSUMED.
FOR JENDL-3, THE RESONANCE ENERGIES WERE ADOPTED FROM
JENDL-2. NEUTRON WIDTHS WERE TAKEN FROM THE MEASUREMENT OF
ANUFRIEV ET AL./5/ OR DETERMINED FROM THE CAPTURE AREA DATA
MEASURED BY MACKLIN/6/ AND AN AVERAGED RADIATION WIDTH OF
131+-69 MEV. RADIATION WIDTHS OF RESONANCES WHOSE NEUTRON
WIDTH WAS MEASURED BY ANUFRIEV ET AL./5/ WERE DETERMINED
FROM THE DATA OF THE CAPTURE AREA MEASURED BY MACKLIN/6/ AND
THE NEUTRON WIDTH/5/. TOTAL SPIN J OF SOME RESONANCES WAS
TENTATIVELY ESTIMATED WITH A RANDOM NUMBER METHOD. NEUTRON
ORBITAL ANGULAR MOMENTUM L OF SOME RESONANCES WAS ESTIMATED
WITH A METHOD OF BOLLINGER AND THOMAS/7/.
UNRESOLVED RESONANCE REGION : 1.000 KEV - 100 KEV
THE NEUTRON STRENGTH FUNCTIONS, S0, S1 AND S2 WERE CALCULATED
WITH OPTICAL MODEL CODE CASTHY/8/. THE OBSERVED LEVEL SPACING
WAS DETERMINED TO REPRODUCE THE CAPTURE CROSS SECTION
CALCULATED WITH CASTHY. THE EFFECTIVE SCATTERING RADIUS WAS
OBTAINED FROM FITTING TO THE CALCULATED TOTAL CROSS SECTION AT
100 KEV. THE RADIATION WIDTH GG WAS BASED ON THE SYSTEMATICS
OF MEASURED VALUES FOR NEIGHBORING NUCLIDES.
TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:
S0 = 0.810E-4, S1 = 3.030E-4, S2 = 0.960E-4, SG = 220.E-4,
GG = 0.125 EV, R = 6.025 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 5.326 -
ELASTIC 3.318 -
CAPTURE 2.008 112
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, BY TAKING ACCOUNT OF
COMPETING REACTIONS, OF WHICH CROSS SECTIONS WERE CALCULATED
WITH PEGASUS/9/ 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/10/, POENITZ AND WHALEN/11/ AND
SO ON, AND APPLIED TO PD ISOTOPES. THE OMP'S FOR CHARGED
PARTICLES ARE AS FOLLOWS:
PROTON = PEREY/12/
ALPHA = HUIZENGA AND IGO/13/
DEUTERON = LOHR AND HAEBERLI/14/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/15/
PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT
AND CAMERON/16/ WERE EVALUATED BY IIJIMA ET AL./17/ 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
/18/.
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./19/.
NO. ENERGY(MEV) SPIN-PARITY
GR. 0.0 5/2 +
1 0.1157 1/2 +
2 0.2140 11/2 -
3 0.3028 5/2 +
4 0.3122 7/2 +
5 0.3482 1/2 +
6 0.3660 9/2 +
7 0.3819 3/2 +
8 0.3924 7/2 +
9 0.4120 1/2 +
10 0.4712 3/2 +
11 0.5677 5/2 +
12 0.6701 5/2 +
13 0.6850 7/2 -
14 0.6980 1/2 +
15 0.7590 3/2 +
16 0.7810 3/2 -
17 0.8060 3/2 -
18 0.8090 5/2 +
19 0.8890 1/2 +
20 1.0230 3/2 +
LEVELS ABOVE 1.03 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/20/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (2.17E-02) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 750 MILLI-BARNS AT 100
KEV MEASURED BY MACKLIN ET AL./21/
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 (= 97.8) 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) 15.90 MB (SYSTEMATICS OF FORREST/23/)
(N,ALPHA) 3.64 MB (SYSTEMATICS OF FORREST)
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 SYST A(1/MEV) T(MEV) C(1/MEV) EX(MEV) PAIRING
---------------------------------------------------------------
44-RU-103 1.890E+01 6.480E-01 1.210E+01 7.110E+00 1.280E+00
44-RU-104 1.650E+01 6.780E-01 8.593E-01 7.878E+00 2.520E+00
44-RU-105 2.025E+01 6.060E-01 1.144E+01 6.747E+00 1.280E+00
44-RU-106 1.870E+01 6.300E-01 1.097E+00 7.896E+00 2.530E+00
45-RH-104 1.714E+01 5.910E-01 1.771E+01 4.018E+00 0.0
45-RH-105 1.637E+01 7.110E-01 8.434E+00 7.191E+00 1.240E+00
45-RH-106 1.700E+01 5.300E-01 8.449E+00 2.973E+00 0.0
45-RH-107 1.963E+01 5.480E-01 3.151E+00 5.336E+00 1.250E+00
46-PD-105 1.791E+01 6.700E-01 9.137E+00 7.207E+00 1.350E+00
46-PD-106 1.717E+01 6.660E-01 8.922E-01 8.024E+00 2.590E+00
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
---------------------------------------------------------------
SYST: * = LDP'S WERE DETERMINED FROM SYSTEMATICS.
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 4.350 FOR PD-107 AND 5.875 FOR PD-108.
REFERENCES
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AND APPLIED SCIENCE, SANTA FE., VOL. 2, P.1627 (1985).
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3) MACKLIN, R.L.: PRIVATE COMMUNICATION (1984).
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5) ANUFRIEV, V.A. ET AL.: PROC FIFTH ALL UNION CONF ON NEUTRON
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(1971).
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CROSS SECTIONS OF FISSION PRODUCTS, BOLOGNA 1979, NEANDC(E)
209L, 103.
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REACTIONS", NORTH HOLLAND (1968).
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