4-Be- 9
4-BE- 9 JAERI EVAL-AUG84 K.SHIBATA
JAERI-M 84-226 DIST-SEP89 REV1-OCT90
----JENDL-3.2 MATERIAL 425
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
84-08 REEVALUATED FOR JENDL-3 BY K.SHIBATA.
DETAILS OF THE EVALUATION ARE GIVEN IN REF/1/.
89-01 MODIFIED BY CONSIDERING NEUTRON EMISSION SPECTRA
90-10 MF=5, MT=16, 24, 46, 47: SPECTRA AT THRESHOLD ENERGIES WERE
MODIFIED.
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA
MF=2 RESONANCE PARAMETER
MT=151 SCATTERING RADIUS ONLY.
MF=3 CROSS SECTIONS
CALCULATED 2200M/S CROSS SECTIONS AND RES. INTEGRALS
2200M/S (B) RES. INTEG. (B)
TOTAL 6.1586 -
ELASTIC 6.1510 -
CAPTURE 0.0076 0.0034
MT=1 SIG-T
BELOW 1 EV, SUM OF SIG-EL AND SIG-CAP. BETWEEN 1 EV AND
830 KEV, THE CROSS SECTION WAS CALCULATED ON THE BASIS OF
THE R-MATRIX THEORY. THE R-MATRIX PARAMETERS WERE
OBTAINED SO AS TO GIVE THE BEST FIT TO THE EXPERIMENTAL
DATA /2/-/6/. ABOVE 830 KEV, BASED ON THE MEASUREMENTS
/5/,/7/,/8/.
MT=2 SIG-EL
BELOW 1 EV, SIG-EL = 6.151 BARNS.
ABOVE 1 EV, THE CROSS SECTION WAS OBTAINED BY SUBTRACTING
THE REACTION CROSS SECTION FROM THE TOTAL CROSS SECTION.
MT=3 NON-ELASTIC
SUM OF MT=4,16,24,102,103,103,105,107
MT=4 TOTAL INELASTIC
SUM OF MT=51 AND 52.
MT=6, 7, 16, 51, 52
THE SHAPE OF THE INELASTIC SCATTERING CROSS SECTION WAS
OBTAINED FROM THE STATISTICAL MODEL CALCULATION. THE
ABSOLUTE VALUE WAS DETERMINED SO THAT A SUM OF THE
INELASTIC SCATTERING AND (N,A1) REACTION CROSS SECTIONS
MIGHT BE EQUAL TO THE (N,2N) REACTION CROSS SECTION IN
JENDL-2. OPTICAL POTENTIAL PARAMETERS OF AGEE AND ROSEN
/9/ WERE USED.
V = 49.3 - 0.33E, WS = 5.75 , VSO = 5.5 (MEV)
R = 1.25 , RS = 1.25 , RSO = 1.25 (FM)
A = 0.65 , B = 0.70 , ASO = 0.65 (FM)
LEVEL SCHEME
NO ENERGY(MEV) SPIN-PARITY
G.S. 0.0 3/2-
1 1.68 1/2+
2 2.429 5/2-
3 2.800 1/2+
4 3.06 5/2+
5 4.7 3/2+
6 6.8 7/2-
7 7.9 5/2- *)
8 11.28 9/2- *)
9 11.81 7/2- *)
10 13.79 5/2- *)
11 14.396 3/2- *)
*) SPIN-PARITY VALUE WAS TENTATIVELY ASSIGNED.
ALL THE EXCITED LEVELS EXCEPT 7.9 AND 13.79 MEV ONES
DECAY BY EMITTING NEUTRONS, CONTRIBUTING TO THE (N,2N)
CROSS SECTION. WITHIN THE FRAMEWORK OF THE CURRENT
ENDF/B FORMAT, DIFFERENT MT NUMBERS WERE ASSIGNED TO
THESE LEVELS.
MT NO. LEVEL
6 2ND+3RD+4TH
7 6TH
16 1ST+5TH+8TH+9TH+11TH+CONT
51 7TH
52 10TH
************************************************************
* THE (N,2N) CROSS SECTIONS IS GIVEN AS A SUM OF MT=6, 7, *
* 16, AND 24. *
************************************************************
MT=24 (N,2N ALPHA)
THIS IS THE CROSS SECTION FOR THE (N,A1) REACTION. THE
1ST EXCITED LEVEL OF HE-6 DECAYS BY EMITTING 2 NEUTRONS.
THE (N,A1) CROSS SECTION WAS CALCULATED WITH THE
STATISTICAL MODEL.
ALPHA POTENTIAL PARAMETERS ARE THE FOLLOWING /10/:
V = 125.0 , WS = 15.0 , VSO = 0.0 (MEV)
R = 1.56 , RS = 1.56 , RC = 1.22 (FM)
A = 0.50 , B = 0.11 (FM)
THE CROSS SECTION WAS NORMALIZED TO THE DATA OF
PERROUD AND SELLEM /11/ AT 14 MEV.
MT=46, 47 SIG-IN
SAME AS MT=6, 7, RESPECTIVELY.
MT=102 CAPTURE
THERMAL CROSS SECTION OF 7.6E-3 BARN WAS OBTAINED FROM
THE RECOMMENDATION BY MUGHABGHAB ET AL./12/
1/V CURVE WAS ASSUMED OVER THE WHOLE ENERGY RANGE.
MT=103 (N,P)
CALCULATED WITH THE STATISTICAL MODEL.
PROTON POTENTIAL PARAMETERS ARE THE FOLLOWING /13/:
V = 59.5 - 0.36E, WS = 12.0 + 0.07E, VSO = 4.9 (MEV)
R = 1.24 , RS = 1.36 , RSO = 1.2 (FM)
RC= 1.3 (FM)
A = 0.63 , B = 0.35 , ASO = 0.31 (FM)
THE CROSS SECTION WAS NORMALIZED TO THE EXPERIMENTAL DATA
OF AUGUSTSON AND MENLOVE /14/, WHO MEASURED DELAYED
NEUTROS, BY TAKING ACCOUNT OF THE BRANCHING RATIO
OF 49.5% FOR LI-9 => BE-9* => 2A + N.
MT=104 (N,D)
BASED ON THE EXPERIMENTAL DATA OF SCOBEL /15/.
MT=105 (N,T)
SUM OF MT=740 AND 741.
MT=107 (N,A0)
BASED ON THE EXPERIMENTAL DATA /10/,/11/,/16/-/19/.
MT=251 MU-BAR
CALCULATED FROM THE DATA IN FILE4.
MT=700, 701 (N,T0),(N,T1)
CALCULATED WITH THE STATISTICAL MODEL.
TRITON POTENTIAL PARAMETERS ARE THE FOLLOWING /20/:
V = 140.0 , WS = 7.5 , VSO = 6.0 (MEV)
R = 1.20 , RS = 2.69 , RSO = 1.20 , RC = 1.30 (FM)
A = 0.45 , B = 0.36 , ASO = 0.7 (FM)
NORMALIZATION WAS TAKEN SO THAT THE TOTAL (N,T) CROSS
SECTION MIGHT BE CONSISTENT WITH THE EXPERIMENTAL DATA
OF BOEDY ET AL./21/
MF=4 ANGULAR DISTRIBUTIONS
MT=2
1.0E-5 EV TO 50 KEV ISOTROPIC IN CM.
50 KEV TO 14 MEV BASED ON THE EXPERIMENTAL DATA
/22/-/27/.
14 MEV TO 20 MEV OPTICAL-MODEL CALCULATIONS USING
THE POTENTIAL PARAMETERS OF
AGEE AND ROSEN /9/.
MT=6
LEGENDRE COEFFICIENTS WERE DERIVED FROM THE EXPERIMENTAL
DATA /27/,/28/.
MT=7
STATISTICAL MODEL CALCULATION
MT=16
KALBACH-MANN SYSTEMATICS/31/
MT=24, 46, 47
CALCULATED BY ASSUMING THE TWO-STEP SEQUENTIAL REACTION
/29/.
MF=5 ENERGY DISTRIBUTION
MT=16
EVAPORATION PLUS 3-BODY PHASE SPACE
MT=24, 46, 47
CALCULATED BY ASSUMING THE TWO-STEP SEQUENTIAL REACTION
/29/.
MF=12 PHOTON-PRODUCTION MULTIPLICITIES
MT=102
BASED ON THE MEASUREMENT OF JURNEY /30/.
MT=701
M=1.0
MF=14 PHOTON ANGULAR DISTRIBUTIONS
MT=102
ASSUMED TO BE ISOTROPIC.
MT=701
ISOTROPIC
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