51-Sb- 0
51-SB- 0 JNDC EVAL-MAR89 JNDC FP NUCLEAR DATA W.G.
DIST-OCT89 REV2-FEB94
----JENDL-3.2 MATERIAL 5100
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
89-03 DATA WERE CONSTRUCTED WITH THOSE FOR SB-121 AND SB-123 WHICH
WERE EVALUATED BY JNDC FP NUCLEAR DATA W.G./1/.
90-07 UNRESOLVED RESONANCE PARAMETERS AND MF=3, MT=251 WERE
MODIFIED.
90-10 SPECTRA AT THRESHOLD ENERGIES WERE MODIFIED.
94-02 JENDL-3.2
CAPTURE CROSS SECTION MODIFIED BY JNDC FPND WG.
OTHER DATA WERE ADOPTED FROM JENDL FUSION FILE.
COMPILED BY T.NAKAGAWA
***** MODIFIED PARTS FOR JENDL-3.2 ********************
ALL CROSS SECTIONS EXCEPT (3,105).
(3,32) AND (3,33) WERE DELETED.
ALL ANGULAR DISTRIBUTIONS EXCEPT FOR (4,2).
ALL ENERGY DISTRIBUTIONS.
***********************************************************
-------------------------------------------------------------
JENDL FUSION FILE /2/ (AS OF FEB. 1994)
EVALUATED BY K.KOSAKO (NEDAC) AND S. CHIBA (NDC/JAERI)
COMPILED BY K.KOSAKO.
- THE INELASTIC SCATTERING CROSS SECTIONS AND ANGULAR
DISTRIBUTIONS OF INELASTICALLY SCATTERED NEUTRONS (EXCEPT
CONTINUUM INELASTIC) WERE CALCULATED WITH CASTHY2Y AND
DWUCKY IN SINCROS-II SYSTEM/3/ INCLUDING CONTRIBUTIONS
FROM DIRECT REACTIONS.
- THE (N,2N), (N,3N), (N,NA), (N,NP), (N,P), (N,D) AND
(N,A) REACTION CROSS SECTIONS (MT=16, 17, 22, 28, 103,
104, 107) WERE CALCULATED BY EGNASH2 IN THE SINCROS-II.
- THE (N,T) REACTION CROSS SECTION, RESONANCE PARAMETERS
AND ANG. DISTRIBUTIONS OF ELASTICALLY SCATTERED NEUTRONS
WERE TAKEN FROM JENDL-3.1.
- ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS WERE REPLACED
BY THOSE CALCULATED BY EGNASH2. THE DDX'S OF THE
CONTINUUM NEUTRONS WERE CALCULATED BY KUMABE'S SYSTEMA-
TICS /4/ USING F15TOB /2/. THE PRECOMPOUND/COMPOUND
RATIO WAS CALCULATED BY THE SINCROS- II CODE SYSTEM.
- OPTICAL-MODEL, LEVEL DENSITY AND OTHER PARAMETERS USED IN
THE SINCROS-II CALCULATION ARE DESCRIBED IN REF./3/.
LEVEL SCHEMES WERE DETERMINED ON THE BASIS OF ENSDF/5/.
-------------------------------------------------------------
MF = 1 GENERAL INFORMATION
MT=451 COMMENTS AND DICTIONARY
MF = 2 RESONANCE PARAMETERS
MT=151 RESOLVED AND UNRESOLVED RESONANCE PARAMETERS
RESOLVED RESONANCE PARAMETERS (MLBW FORMULA)
1) SB-121 : BELOW 2 KEV
EVALUATION WAS MADE ON THE BASIS OF DATA MEASURED BY
OHKUBO ET AT./6,7/, BOLOTIN AND CHRIEN/8/, WYNCHANK ET
AL./9/, MURADJAN ET AL./10/ AND ADAMCHUK ET AL./11/.
ANGULAR MOMENTUM L AND SPIN J WERE BASED ON THE DATA BY
BELYAEV ET AL./12/, BAHT ET AL./13/ AND CAUVIN ET AL./14/.
THE AVERAGE RADIATIVE CAPTURE WIDTH OF 0.089 EV WAS
ASSUMED.
2) SB-123 : BELOW 2.5 KEV
EVALUATION WAS MADE ON THE BASIS OF THE DATA MEASURED BY
OHKUBO ET AL./6,15/, STOLVY AND HARVEY/16/, BOLOTIN AND
CHRIEN/8/, WYNCHANK ET AL./9/, MURADJAN ET AL./10/ AND
ADAMCHUK ET AL./11/. ANGULAR MOMENTUM L AND SPIN J WERE
BASED ON THE DATA BY BAHT ET AL./13/ AND CAUVIN ET AL./14/.
THE AVERAGE RADIATIVE CAPTURE WIDTH OF 0.098 EV WAS
ASSUMED.
UNRESOLVED RESONANCE REGION : UP TO 100 KEV
THE NEUTRON STRENGTH FUNCTIONS, S0, S1 AND S2 WERE CALCULATED
WITH OPTICAL MODEL CODE CASTHY/17/. 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.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 8.943 -
ELASTIC 3.722 -
CAPTURE 5.221 175
MF = 3 NEUTRON CROSS SECTIONS
BELOW 100 KEV, RESONANCE PARAMETERS WERE GIVEN.
FOR JENDL-3.1, ABOVE 100 KEV, THE SPHERICAL OPTICAL AND
STATISTICAL MODEL CALCULATION WAS PERFORMED WITH CASTHY/17/, BY
TAKING ACCOUNT OF COMPETING REACTIONS, OF WHICH CROSS SECTIONS
WERE CALCULATED WITH PEGASUS/18/ STANDING ON A PREEQUILIBRIUM
AND MULTI-STEP EVAPORATION MODEL. THE OMP'S FOR NEUTRON GIVEN
IN TABLE 1 WERE ADOPTED FROM IIJIMA AND KAWAI/19/ BY MODIFYING
RADIUS PARAMETER OF THE SPIN-ORBIT TERM. THE OMP'S FOR CHARGED
PARTICLES ARE AS FOLLOWS:
PROTON = PEREY/20/
ALPHA = HUIZENGA AND IGO/21/
DEUTERON = LOHR AND HAEBERLI/22/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/23/
PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GIRBERT
AND CAMERON/24/ WERE EVALUATED BY IIJIMA ET AL./25/. 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
/26/.
FOR JENDL-3.2, ALL CROSS SECTION DATA EXCEPT FOR THE ELASTIC
SCATTERING, CAPTURE AND (N,T) WERE ADOPTED FROM JENDL FUSION
FILE. THE CALCULATION WAS MADE WITH SINCROS-II SYSTEM/3/ BY
ADOPTING WALTER-GUSS OMP MODIFIED BY YAMAMURO/3/ FOR NEUTRON,
PEREY OMP /27/ FOR PROTON, LEMOS OMP MODIFIED BY ARTHUR AND
YOUNG/28/ FOR ALPHA, LOHR-HAEBERLI OMP/29/ FOR DEUTERON,
BECCHETTII-GREENLEES OMP/30/ FOR TRITON AND HE-3, AND STANDARD
LEVEL DENSITY PARAMETERS OF SINCROS-II SYSTEM.
MT = 1 TOTAL
SPHERICAL OPTICAL MODEL CALCULATION WAS ADOPTED IN THE ENERGY
RANGES BELOW 500 KEV. BETWEEN 500 KEV AND 11.5 MEV, SPLINE
FITTING TO THE EXPERIMENTAL DATA /31,32/ WAS PERFORMED. ABOVE
THIS, EXPERIMENTAL DATA WERE CONNECTED BY EYE-GUIDING.
MT = 2 ELASTIC SCATTERING
CALCULATED AS (TOTAL - SUM OF PARTIAL CROSS SECTIONS).
MT = 4, 51 - 91 INELASTIC SCATTERING
THE CROSS SECTIONS WERE TAKEN FROM JENDL FUSION FILE. THE
LEVEL SCHEME WAS BASED ON REF./5/ CONTRIBUTIONS OF THE
DIRECT PROCESS WERE CALCULATED FOR THE LEVELS MARKED WITH '*'.
--- SB-121 --- --- SB-123 ---
NO. MT ENERGY(MEV) J-PARITY NO. MT ENERGY(MEV) J-PARITY
GR. 0.0 5/2 + GR. 0.0 7/2 +
1 51 0.0371 7/2 + * 1 52 0.1603 5/2 + *
2 53 0.5076 3/2 + * 2 54 0.5418 3/2 + *
3 55 0.5731 1/2 + * 3 56 0.7128 1/2 +
4 57 0.9470 9/2 + * 4 59 1.0302 9/2 + *
5 58 1.0240 7/2 + * 5 61 1.0886 9/2 + *
6 60 1.0354 9/2 + 6 64 1.1813 7/2 + *
7 62 1.1393 11/2 + 7 65 1.2609 5/2 + *
8 63 1.1447 9/2 + * 8 66 1.3374 7/2 + *
9 67 1.3862 9/2 +
10 68 1.4075 5/2 +
11 69 1.4105 7/2 +
12 70 1.4272 9/2 + *
13 71 1.4480 1/2 -
OVERLAPPING LEVELS WERE ASSUMED ABOVE 1.449 MEV FOR SB-121
AND ABOVE 1.338 MEV FOR SB-123.
MT = 102 CAPTURE
SPHERICAL OPTICAL AND STATISTICAL MODEL CALCULATION WITH
CASTHY/17/ WAS ADOPTED. DIRECT AND SEMI-DIRECT CAPTURE CROSS
SECTIONS WERE ESTIMATED ACCORDING TO THE PROCEDURE OF BENZI
AND REFFO/33/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTIONS WERE ADJUSTED TO REPRODUCE
THE CAPTURE CROSS SECTIONS.
CROSS SECTION (1 MEV) STRENGTH FUNCTION
SB-121 0.110 BARN 54.5E-4
SB-123 0.084 BARN 24.2E-4
MT = 16, 17, 22, 28, 103, 104, 107
(N,2N), (N,3N), (N,N'A), (N,N'P), (N,P), (N,D)
AND (N,ALPHA) CROSS SECTIONS
ADOPTED FROM JENDL FUSION FILE. THEORETICAL CALCULATION WAS
MADE WITH SINCROS-II FOR EACH ISOTOPES, AND THE RESULTS WERE
NORMALIZED TO EXPERIMENTAL DATA.
MT = 105 (N,T) CROSS SECTIONS
CALCULATED WITH THE PREEQUILIBRIUM AND MULTI-STEP EVAPORATION
MODEL CODE PEGASUS/18/.
THE KALBACH'S CONSTANTS WERE ESTIMATED BY THE FORMULA DERIVED
FROM KIKUCHI-KAWAI'S FORMALISM/34/ AND LEVEL DENSITY
PARAMETERS.
SB-121: 145.3, SB-123: 174.0
MT = 251 MU-BAR
CALCULATED WITH CASTHY/17/.
MF = 4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2
CALCULATED WITH THE CASTHY CODE/17/.
MT=16, 17, 22, 28, 51-91
TAKEN FROM JENDL FUSION FILE.
MF = 5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16, 17, 22, 28, 51-91
TAKEN FROM JENDL FUSION FILE.
<< THE PARAMETERS USED IN THE CASTHY AND PEGASUS CALCULATIONS.>>
TABLE 1 NEUTRON OPTICAL POTENTIAL PARAMETERS
DEPTH (MEV) RADIUS(FM) DIFFUSENESS(FM)
---------------------- ------------ ---------------
V = 47.64-0.473E R0 = 6.256 A0 = 0.62
WS = 9.744 RS = 6.469 AS = 0.35
WSO= 7.0 RSO= 6.241 ASO= 0.62
TABLE 2 LEVEL DENSITY PARAMETERS
NUCLIDE SYST A(/MEV) T(MEV) C(/MEV) EX(MEV) PAIRING
---------------------------------------------------------------
49-IN-117 1.678E+01 6.010E-01 2.387E+00 5.208E+00 1.150E+00
49-IN-118 * 1.804E+01 6.064E-01 3.111E+01 4.636E+00 0.0
49-IN-119 1.940E+01 5.340E-01 2.195E+00 4.999E+00 1.240E+00
49-IN-120 * 1.757E+01 6.016E-01 2.330E+01 4.366E+00 0.0
49-IN-121 1.601E+01 6.060E-01 1.119E+00 5.277E+00 1.430E+00
49-IN-122 * 1.707E+01 5.968E-01 1.737E+01 4.092E+00 0.0
50-SN-118 1.633E+01 6.140E-01 3.341E-01 6.448E+00 2.340E+00
50-SN-119 1.635E+01 5.990E-01 1.772E+00 5.050E+00 1.190E+00
50-SN-120 1.595E+01 6.540E-01 4.691E-01 7.083E+00 2.430E+00
50-SN-121 1.630E+01 6.100E-01 2.010E+00 5.217E+00 1.190E+00
50-SN-122 1.434E+01 7.060E-01 3.423E-01 7.416E+00 2.620E+00
50-SN-123 1.509E+01 6.870E-01 3.062E+00 6.032E+00 1.190E+00
51-SB-119 * 1.858E+01 6.040E-01 5.801E+00 5.944E+00 1.150E+00
51-SB-120 * 1.834E+01 6.016E-01 3.366E+01 4.659E+00 0.0
51-SB-121 1.730E+01 5.740E-01 1.715E+00 5.022E+00 1.240E+00
51-SB-122 1.772E+01 5.500E-01 1.346E+01 3.517E+00 0.0
51-SB-123 1.585E+01 6.213E-01 1.285E+00 5.469E+00 1.430E+00
51-SB-124 1.696E+01 5.600E-01 1.090E+01 3.433E+00 0.0
---------------------------------------------------------------
SYST: * = LDP'S WERE DETERMINED FROM SYSTEMATICS.
REFERENCES
1) KAWAI, M. ET AL.: J. NUCL. SCI. TECHNOL., 29, 195 (1992).
2) CHIBA, S. ET AL.: JAERI-M 92-027, P.35 (1992).
3) YAMAMURO, N.: JAERI-M 90-006 (1990).
4) KUMABE, I. ET AL.: NUCL. SCI. ENG., 104, 280 (1990).
5) ENSDF: EVALUATED NUCLEAR STRUCTURE DATA FILE, BNL/NNDC.
6) OHKUBO, M. ET AL.: JAERI-M 93-012 (1993).
7) OHKUBO, M. ET AL.: J. PHYS. SOC. JAPAN, 33, 1185 (1972).
8) BOLOTIN, H. AND CHRIEN, R.E.: NUCL. PHYS., 42, 676 (1963).
9) WYNCHANK, S., ET AL.: PHYS. REV., 166, 1234 (1968).
10) MURADJAN, G.V., ET AL.: JADERNO-FIZICHESKIE ISSLEDOVANIJA,
6, 64 (1968).
11) ADAMCHUK, JU.V., ET AL.: IAE-2108 (1971).
12) BELYAEV, F.N. ET AL.: "PROC. 6TH ALL UNION CONF. ON NEUTRON
PHYSICS, KIEV 1983", VOL. 2, 366 (1983).
13) BAHT, M.R., ET AL.: PHYS. REV., C2, 1115 (1970).
14) CAUVIN, B., ET AL.: "PROC. 3RD CONF. ON NEUTRON CROSS
SECTIONS AND TECHNOL., KNOXVILLE 1971", VOL. 2, 785 (1971).
15) OHKUBO, M. ET AL.: J. PHYS. SOC. JAPAN, 33, 1185 (1972).
16) STOLVY, A. AND HARVEY, J.A.: PHYS. REV., 108, 353 (1957).
17) IGARASI, S. AND FUKAHORI, T.: JAERI 1321 (1991).
18) IIJIMA, S. ET AL.: JAERI-M 87-025, P. 337 (1987).
19) IIJIMA, S. AND KAWAI, M.: J. NUCL. SCI. TECHNOL., 20, 77
(1983).
20) PEREY, F.G: PHYS. REV. 131, 745 (1963).
21) HUIZENGA, J.R. AND IGO, G.: NUCL. PHYS. 29, 462 (1962).
22) LOHR, J.M. AND HAEBERLI, W.: NUCL. PHYS. A232, 381 (1974).
23) BECCHETTI, F.D., JR. AND GREENLEES, G.W.: POLARIZATION
PHENOMENA IN NUCLEAR REACTIONS ((EDS) H.H. BARSHALL AND
W. HAEBERLI), P. 682, THE UNIVERSITY OF WISCONSIN PRESS.
(1971).
24) GILBERT, A. AND CAMERON, A.G.W.: CAN. J. PHYS., 43, 1446
(1965).
25) IIJIMA, S., ET AL.: J. NUCL. SCI. TECHNOL. 21, 10 (1984).
26) GRUPPELAAR, H.: ECN-13 (1977).
27) PEREY, F.G.: PHYS. REV., 131, 745 (1963).
28) ARTHUR, E.D. AND YOUNG, P.G.: LA-8626-MS (1980).
29) LOHR, J.M. AND HAEBERLI W.: NUCL. PHYS., A232, 381 (1974).
30) BECCHETTI, F.D. JR. AND GREENLEES G.W.: "POLARIZATION
PHENOMENA IN NUCL. REACTIONS," UNIV. WISCONSIN PRESS, P.682
(1971).
31) FOSTER JR.D.G. AND GLASGOW D.W.: PHYS. REV., C3, 576 (1971).
32) SMITH, A.B. ET AL.: NUCL. PHYS., A415, 1 (1984).
33) BENZI, V. AND REFFO, G.: CCDN-NW/10 (1969).
34) KIKUCHI, K. AND KAWAI, M.: "NUCLEAR MATTER AND NUCLEAR
REACTIONS", NORTH HOLLAND (1968).