44-Ru-102
44-RU-102 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-NOV90
----JENDL-3.2 MATERIAL 4443
-----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/.
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 13.4 KEV
RESONANCE PARAMETERS OF JENDL-2/1/ WERE MODIFIED ACCORDING
TO NEW EXPERIMENTAL DATA.
FOR JENDL-2, RESONANCE ENERGIES BELOW 2.5 KEV WERE TAKEN
FROM THE DATA OF PRIESMEYER AND JUNG/3/ AND SHAW ET AL./4/,
AND THE OTHER RESONANCES ABOVE 2.7 KEV FROM MACKLIN AND
HALPERIN/5/. THE NEUTRON AND RADIATION WIDTHS OF LARGE
RESONANCES WERE TAKEN FROM PRIESMEYER AND JUNG/3/ AND MACKLIN
AND HALPERIN/5/. FOR OTHERS, THE AVERAGE RADIATION WIDTH OF
0.112+-0.027 EV WAS ADOPTED. FOR LEVELS OBSERVED BY SHAW ET
AL. AND FOR THREE FICTITIOUS LEVELS AT 2.467, 2.556 AND 2.645
KEV, THE PARAMETERS WERE DETERMINED BY ASSUMING S0=0.43E-4,
D0=340 EV, S1=4.1E-4 AND D1=110 EV. PARAMETERS OF THE
NEGATIVE LEVEL ADDED AT -146 EV AND THE FIRST POSITIVE LEVEL
WERE ADJUSTED TO REPRODUCE THE CAPTURE CROSS SECTION OF 1.21
+-0.07 BARNS AT 0.0253 EV AND ITS RESONANCE INTEGRAL OF 4.2
+-0.1 BARNS/6/.
FOR JENDL-3, NEUTRON AND RADIATION WIDTHS OF 14 RESONANCES
WERE REEVALUATED ON THE BASIS OF THE EXPERIMENTAL DATA OF
ANUFRIEV ET AL./7/ FOR THE RESONANCES OBSERVED BY SHAW ET
AL., REDUCED NEUTRON WIDTHS WERE GIVEN AS 6.5 MEV AND 65 MEV
FOR S-WAVE AND P-WAVE RESONANCES, RESPECTIVELY. PARAMETERS OF
THE NEGATIVE RESONANCE WERE ALSO REVISE. SCATTERING RADIUS
WAS MODIFIED FROM 6.35 FM TO 6.1 FM BASED ON THE SYSTEMATICS.
NEUTRON ORBITAL ANGULAR MOMENTUM L OF SOME RESONANCES WAS
ESTIMATED WITH A METHOD OF BOLLINGER AND THOMAS/8/.
UNRESOLVED RESONANCE REGION : 13.4 KEV - 100 KEV
UNRESOLVED RESONANCE PARAMETERS WERE ADOPTED FROM JENDL-2.
THE NEUTRON STRENGTH FUNCTIONS, S0, S1 AND S2 WERE CALCULATED
WITH OPTICAL MODEL CODE CASTHY/9/. 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.
TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:
S0 = 0.450E-4, S1 = 5.000E-4, S2 = 0.530E-4, SG = 3.61E-4,
GG = 0.115 EV, R = 5.756 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 6.791 -
ELASTIC 5.561 -
CAPTURE 1.229 4.32
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/10/ STANDING ON A PREEQUILIBRIUM AND MULTI-STEP
EVAPORATION MODEL. THE OMP'S FOR NEUTRON GIVEN IN TABLE 1 WERE
DETERMINED TO REPRODUCE A SYSTEMATIC TREND OF THE TOTAL CROSS
SECTION BY CHANGING RSO OF IIJIMA-KAWAI POTENTIAL/11/. 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 DWBA CAL.
GR. 0.0 0 +
1 0.4751 2 + *
2 0.9437 0 +
3 1.1032 2 +
4 1.1064 4 +
5 1.5217 3 +
6 1.5806 2 +
7 1.6027 4 +
8 1.7987 4 +
9 1.8371 0 +
10 1.8732 6 +
11 2.0369 2 +
12 2.0442 3 - *
13 2.2192 5 +
14 2.2612 2 +
15 2.3720 5 -
16 2.4211 4 +
17 2.4419 4 +
LEVELS ABOVE 2.5 MEV WERE ASSUMED TO BE OVERLAPPING.
FOR THE LEVELS WITH AN ASTERISK, THE CONTRIBUTION OF DIRECT
INELASTIC SCATTERING CROSS SECTIONS WAS CALCULATED BY THE
DWUCK-4 CODE/20/. DEFORMATION PARAMETERS (BETA2 = 0.2443 AND
BETA3 = 0.196) WERE BASED ON THE DATA COMPILED BY RAMAN ET
AL./21/ AND SPEAR/22/, RESPECTIVELY.
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/23/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (3.44E-04) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 110 MILLI-BARNS AT 70
KEV MEASURED BY MACKLIN ET AL./24,25/
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 =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 (= 72.0) WAS ESTIMATED BY THE
FORMULA DERIVED FROM KIKUCHI-KAWAI'S FORMALISM/26/ 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) 16.70 MB (SYSTEMATICS OF FORREST/27/)
(N,ALPHA) 6.20 MB (RECOMMENDED BY FORREST/27/)
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. CONTRIBUTION OF DIRECT INELASTIC
SCATTERING WAS CALCULATED WITH DWUCK-4. FOR OTHER REACTIONS,
ISOTROPIC DISTRIBUTIONS 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 = 47.5 R0 = 5.972 A0 = 0.62
WS = 9.74 RS = 6.594 AS = 0.35
VSO= 7.0 RSO= 5.97 ASO= 0.62
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
---------------------------------------------------------------
42-MO- 98 1.594E+01 6.900E-01 7.358E-01 7.888E+00 2.570E+00
42-MO- 99 1.774E+01 6.200E-01 4.294E+00 6.058E+00 1.280E+00
42-MO-100 1.780E+01 6.000E-01 6.702E-01 6.645E+00 2.220E+00
42-MO-101 2.085E+01 5.650E-01 7.153E+00 6.092E+00 1.280E+00
43-TC- 99 1.600E+01 6.550E-01 2.973E+00 5.984E+00 1.290E+00
43-TC-100 1.637E+01 5.850E-01 1.189E+01 3.635E+00 0.0
43-TC-101 1.675E+01 6.440E-01 6.361E+00 5.761E+00 9.400E-01
43-TC-102 1.761E+01 5.400E-01 1.217E+01 3.317E+00 0.0
44-RU-100 1.520E+01 7.200E-01 7.835E-01 8.078E+00 2.570E+00
44-RU-101 1.726E+01 6.700E-01 7.228E+00 6.836E+00 1.280E+00
44-RU-102 1.643E+01 6.550E-01 8.872E-01 7.106E+00 2.220E+00
44-RU-103 1.890E+01 6.480E-01 1.210E+01 7.110E+00 1.280E+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 7.654 FOR RU-102 AND 5.045 FOR RU-103.
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