44-Ru-101
44-RU-101 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-SEP90 REV2-OCT93
----JENDL-3.2 MATERIAL 4440
-----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/.
93-10 JENDL-3.2 WAS MADE BY JNDC FPND W.G.
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(2,151) SMALL CHANGE IN UNRESOLVED RES. PARAMTERS
(3,2), (3,4), (3,51-91), (3,102)
(4,51-91)
LEVEL SCHEME FOR INELASTIC SCATTERING CROSS
SECTIONS WERE REPLACED.
***********************************************************
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 1.06 KEV
RESONANCE PARAMETERS OF JENDL-2 WERE MODIFIED ACCORDING TO NEW
EXPERIMENTAL DATA.
FOR JENDL-2, PARAMETERS WERE DETERMINED FROM THE EXPERIMEN-
TAL DATA OF PRIESMEYER AND JUNG/3/ AND POPOV ET AL./4/
VALUES OF SPIN J WERE BASED ON THE DATA OF COCEVA ET AL./5/
A NEGATIVE RESONANCE WAS ADDED AT -20 EV TO REPRODUCE THE
CAPTURE CROSS SECTION OF 3.4+-0.9 BARNS AT 0.0253 EV/6/.
AVERAGE RADIATION WIDTH OF 0.180+-0.022 EV WAS DEDUCED, AND
ADOPTED TO THE LEVELS WHOSE RADIATION WIDTH WAS UNKNOWN.
FOR JENDL-3, PARAMETERS OF 40 LEVELS WERE REEVALUATED ON
THE BASIS OF THE NEW EXPERIMENTAL DATA OF ANUFRIEV/7/ FOR
NEUTRON WIDTHS. RADIATION WIDTHS AND TOTAL SPIN J OF
SEVERAL LEVELS WERE ALSO REVISED ACCORDING TO ANUFRIEV'S
DATA. SCATTERING RADIUS WAS MODIFIED TO 6.1 FM. TOTAL SPIN
J OF SOME RESONANCES WAS TENTATIVELY ESTIMATED WITH A RANDOM
NUMBER METHOD. NEUTRON ORBITAL ANGULAR MOMENTUM L OF SOME
RESONANCES WAS DETERMINED WITH A METHOD OF BOLLINGER AND
THOMAS/8/.
UNRESOLVED RESONANCE REGION : 1.06 KEV - 100 KEV
THE PARAMETERS WERE ADJUSTED TO REPRODUCE THE CAPTURE CROSS
SECTION MEASURED BY MACKLIN ET AL./9,10/ 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 = 0.59E-4, S1 = 6.10E-4, S2 = 0.54E-4, SG = 105.E-4,
GG = 0.173 EV, R = 5.062 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 7.100 -
ELASTIC 3.741 -
CAPTURE 3.359 100
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/11/, BY TAKING ACCOUNT OF
COMPETING REACTIONS, OF WHICH CROSS SECTIONS WERE CALCULATED
WITH PEGASUS/12/ 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/13/. THE
OMP'S FOR CHARGED PARTICLES ARE AS FOLLOWS:
PROTON = PEREY/14/
ALPHA = HUIZENGA AND IGO/15/
DEUTERON = LOHR AND HAEBERLI/16/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/17/
PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT
AND CAMERON/18/ WERE EVALUATED BY IIJIMA ET AL./19/ 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
/20/.
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./21/.
NO. ENERGY(MEV) SPIN-PARITY
GS 0.0 5/2 +
1 0.12723 3/2 +
2 0.30685 7/2 +
3 0.31133 5/2 +
4 0.32480 1/2 +
5 0.42230 3/2 +
6 0.52750 11/2 -
7 0.53500 5/2 +
8 0.54508 7/2 +
9 0.59830 5/2 -
10 0.61630 3/2 +
11 0.62300 3/2 +
12 0.62350 1/2 +
13 0.68400 3/2 +
14 0.71800 1/2 -
15 0.72000 9/2 +
16 0.82300 3/2 +
17 0.84278 7/2 +
18 0.90800 1/2 -
19 0.92700 3/2 +
20 0.92872 9/2 +
21 0.93847 7/2 +
22 0.97340 5/2 +
23 1.0012 11/2 +
24 1.0410 3/2 +
25 1.0510 7/2 +
26 1.0980 1/2 +
27 1.1100 1/2 +
28 1.1690 3/2 +
LEVELS ABOVE 1.2068 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/22/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (1.16E-02) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 500 MILLI-BARNS AT 100
KEV MEASURED BY MACKLIN ET AL./9,10/
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 =106 (N,HE3) 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 (= 106.5) WAS ESTIMATED BY THE
FORMULA DERIVED FROM KIKUCHI-KAWAI'S FORMALISM/23/ 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) 24.00 MB (SYSTEMATICS OF FORREST/24/)
(N,ALPHA) 6.07 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 TO 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- 97 1.517E+01 6.800E-01 2.769E+00 6.036E+00 1.280E+00
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
43-TC- 98 1.659E+01 6.120E-01 1.776E+01 4.176E+00 0.0
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
44-RU- 99 1.650E+01 6.570E-01 4.016E+00 6.235E+00 1.280E+00
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
---------------------------------------------------------------
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 14.30 FOR RU-101 AND 7.654 FOR RU-102.
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