82-Pb-204
82-PB-204 JAERI EVAL-JUL87 M.MIZUMOTO
DIST-SEP89 REV2-APR94
----JENDL-3.2 MATERIAL 8225
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 NEWLY EVALUATED FOR JENDL-3 BY M. MIZUMOTO (JAERI)
87-11 REVISE IS RECOMMENDED.
89-09 REVISION IS COMPLETED.
COMPILATION WAS MADE BY T. NARITA AND T.FUKAHORI (JAERI)
94-04 JENDL-3.2.
BY ADOPTING THE DATA FROM JENDL FUSION FILE
GAMMA-RAY PRODUCTION DATA MODIFIED BY K.SHIBATA(JAERI)
COMPILED BY T.NAKAGAWA (NDC/JAERI)
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(3,2), (3,4), (3,16). (3,17), (3,22), (3,28), (3,51-91)
(4,16-91), (5,16-91)
THESE DATA WERE TAKEN FROM JENDL FUSION FILE.
(12,102) FROM ENERGY BALANCE
(15,102) SPECTRUM AT 1.0E-5 EV
***********************************************************
-------------------------------------------------------------
JENDL FUSION FILE /1/ (AS OF OCT. 1993)
EVALUATED BY K.KOSAKO (NEDAC) AND S.CHIBA (NDC/JAERI)
COMPILED BY K.KOSAKO.
DATA WERE TAKEN FROM JENDL-3.1 EXCEPT FOR THE FOLLOWING:
- 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/2/ INCLUDING CONTRIBUTIONS
FROM DIRECT REACTIONS.
- THE (N,2N), (N,3N), (N,NA) AND (N,NP) REACTION CROSS
SECTIONS (MT=16, 17, 22, 28) WERE CALCULATED BY EGNASH2
IN THE SINCROS-II. THE (N,2N) CROSS SECTION WAS
RENORMALIZED TO EXPERIMENTAL DATA.
- ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS WERE REPLACED
WITH THOSE CALCULATED BY EGNASH2. THE DDX'S OF THE
CONTINUUM NEUTRONS WERE CALCULATED BY KUMABE'S SYSTEMA-
TICS /3/ USING F15TOB /1/. 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./2/.
LEVEL SCHEMES WERE DETERMINED ON THE BASIS OF ENSDF/4/.
-------------------------------------------------------------
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA AND DICTIONARY
MF=2 RESONANCE PARAMETERS
MT=151 RESOLVED RESONANCE PARAMETERS FOR MLBW FORMULA
RESONANCE RANGES: 1.0E-5 EV TO 50 KEV
PARAMETERS WERE EVALUATED FROM THE DATA OF HOREN+84 /5/.
EFFECTIVE SCATTERING RADIUS OF 8.5 FM WAS SELECTED.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS.
2200 M/S RES. INTEG.
ELASTIC 11.197 B -
CAPTURE 0.661 B 1.848 B
TOTAL 11.857 B -
MF=3 NEUTRON CROSS SECTIONS
BELOW 50 KEV
BACKGROUND CROSS SECTIONS ARE GIVEN FOR THE ELASTIC SCATTERING
AND CAPTURE CROSS SECTIONS.
ABOVE 50 KEV
CROSS SECTIONS FOR JENDL-3.1 WERE OBTAINED FROM OPTICAL AND
STATISTICAL MODEL CALCULATIONS. THE OPTICAL POTENTIAL PARAME-
TERS WERE OBTAINED BY FITTING AVERAGE TOTAL CROSS SECTION OF
NATURAL LEAD:
V=47.0 - 0.250*E, WS = 2.30 + 0.41*E, VSO = 6.0 (MEV)
R0 = 1.25 , RS = 1.30 , RSO = 1.30 (FM)
A0 = 0.65 , B=0.48 , AS0 = 0.689 (FM)
LEVEL DENSITY PARAMETERS WERE DETERMINED USING LOW-LYING LEVEL
DATA AND OBSERVED NEUTRON RESONANCE SPACING.
FOR JENDL-3.2, THE (N,2N), (N,3N), (N,NA), (N,NP) AND INELASTIC
SCATTERING CROSS SECTIONS WERE ADOPTED FROM JENDL FUSION FILE.
THEY WERE CALCULATED WITH SINCROS-II SYSTEM/2/ BY ADOPTING
WALTER-GUSS OMP MODIFIED BY YAMAMURO/2/ FOR NEUTRON, PEREY OMP
/6/ FOR PROTON, LEMOS OMP MODIFIED BY ARTHUR AND YOUNG/7/ FOR
ALPHA, LOHR-HAEBERLI OMP/8/ FOR DEUTERON, BECCHETTII-GREENLEES
OMP/9/ FOR TRITON AND HE-3, AND STANDARD LEVEL DENSITY
PARAMETERS OF SINCROS-II SYSTEM.
THE DATA OF TOTAL, CAPTURE, (N,P), (N,D) AND (N,A) CROSS
SECTIONS ARE THE SAME AS JENDL-3.1.
MT=1 TOTAL
CALCULATED WITH OPTICAL AND STATISTICAL MODE CODE CASTHY /10/
MT=2 ELASTIC SCATTERING
(TOTAL)-(ALL OTHER PARTIAL CROSS SECTIONS)
MT=4,51-61,91 INELASTIC SCATTERING
THE CROSS SECTIONS WERE TAKEN FROM JENDL FUSION FILE. THE LEVEL
SCHEME WAS ADOPTTED FROM REF./4/ CONTRIBUTIONS OF THE DIRECT
PROCESS WERE CALCULATED FOR THE LEVELS MARKED WITH '*', USING
DEFORMATION PARAMETERS COMPILED BY RAMAN ET AL./11/ AND
SPEAR/12/.
NO. ENERGY(MEV) SPIN-PARITY (DIRECT PROCESS)
G.S. 0.0 0.0 +
1 0.8992 2.0 + *
2 1.2739 4.0 + *
3 1.3514 2.0 + *
4 1.5631 4.0 + *
5 1.5836 0.0 +
6 1.6047 3.0 +
7 1.665 2.0 + *
8 1.682 1.0 +
9 1.73 0.0 +
10 1.7619 1.0 -
11 1.8173 4.0 + *
LEVELS ABOVE 1.817 MEV WERE ASSUMED TO BE CONTINUUM.
MT=16, 17, 22, 28 (N,2N), (N,3N), (N,NA), (N,NP)
ADOPTED FROM JENDL FUSION FILE. THEORETICAL CALCULATION WAS
MADE WITH SINCROS-II. THE (N,2N) CROSS SECTION WAS NORMALIZED
TO 2.12 B AT 13.98 MEV MEASURED BY IKEDA ET AL./13/,
MT=102 CAPTURE
CALCULATED WITH CASTHY /10/.
MT=103, 107 (N,P), (N,A)
CALCULATED WITH GNASH /14/.
MT=251 MU-BAR
CALCULATED WITH CASTHY /10/.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2
CALCULATED WITH CASTHY /10/.
MT=51-61
TAKEN FROM JENDL FUSION FILE. CALCULATED WITH THE CASTHY AND
DWUCKY IN THE SINCROS-II SYSTEM.
MT=16, 17, 22, 28, 91
TAKEN FROM JENDL FUSION FILE.
MF=5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16, 17, 22, 28, 91
TAKEN FROM JENDL FUSION FILE.
MF=12 GAMMA-RAY MULTIPLICITY PRODUCED BY NEUTRON REACTIONS
MT=16,17,22,91
CALCULATED WITH GNASH /14/.
MT=51-61
TRANSITION PROBABILITIES WERE GIVEN.
MT=102
FROM ENERGY BALANCE.
MF=14 ANGULAR DISTRIBUTIONS OF SECONDARY GAMMA-RAYS
MT=16,17,51-61,22,91,102: ASSUMED TO BE ISOTROPIC.
MF=15 ENERGY DISTRIBUTION OF SECONDARY GAMMA-RAYS
MT=16,17,91,102: CALCULATED WITH THE GNASH /14/.
REFERENCES
1) CHIBA, S. ET AL.: JAERI-M 92-027, P.35 (1992).
2) YAMAMURO, N.: JAERI-M 90-006 (1990).
3) KUMABE, I. ET AL.: NUCL. SCI. ENG., 104, 280 (1990).
4) ENSDF: EVALUATED NUCLEAR STRUCTURE DATA FILE, BNL/NNDC.
5) HOREN D.J. ET AL. : PHYS. REV. C29, 2126 (1984).
6) PEREY F.G.: PHYS. REV., 131, 745 (1963).
7) ARTHUR, E.D. AND YOUNG, P.G.: LA-8626-MS (1980).
8) LOHR J.M. AND HAEBERLI W.: NUCL. PHYS., A232, 381 (1974).
9) BECCHETTI F.D. JR. AND GREENLEES G.W.: "POLARIZATION
PHENOMENA IN NUCL. REACTIONS," UNIV. WISCONSIN PRESS, P.682
(1971).
10) IGARASI S. AND FUKAHORI T.: JAERI 1321 (1991).
11) RAMAN, S., ET AL.: ATOM. DATA AND NUCL. DATA TABLES 36, 1
(1987)
12) SPEAR, R.H.: ATOM. DATA AND NUCL. DATA TABLE, 42, 55 (1989).
13) IKEDA Y. ET AL.: JAERI 1312 (1987).
14) YOUNG P.G. AND ARTHUR E.D.: LA-6974 (1977).