7-N - 15
7-N - 15 JAERI EVAL-DEC88 T.FUKAHORI
JAERI-M 89-047 DIST-SEP89 REV2-APR94
----JENDL-3.2 MATERIAL 728
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
88-12 NEWLY EVALUATED BY T.FUKAHORI (JAERI)/1/
94-04 JENDL-3.2
COMPILED BY T.FUKAHORI AND K.SHIBATA (NDC/JAERI)
***** MODIFIED PARTS FOR JENDL-3.2 ********************
( 2,151) OMITTED EXCEPT SCATTERING RADIUS
( 3, 1) BELOW 5.5 MEV, CHANGED TO POINT-WISE CROSS SECTION
( 3, 2) BELOW 5.5 MEV, CHANGED TO POINT-WISE CROSS SECTION
( 3,102) BELOW 5.5 MEV, CHANGED TO POINT-WISE CROSS SECTION
(12,102) FROM ENERGY BALANCE
***********************************************************
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA AND DICTIONARY
MF=2 RESONANCE PARAMETERS
MT=151 ONLY SCATTERING RADIUS IS GIVEN.
2200 M/SEC CROSS SECTIONS AND RESONANCE INTEGRALS
2200 M/SEC RES. INTEG.
TOTAL 4.590 B -
ELASTIC 4.590 B -
CAPTURE 0.024 MB 0.016 MB
MF=3 CROSS SECTIONS
MT=1 TOTAL CROSS SECTION
BELOW 5.5 MEV, RESONANCE PARAMETERS OF THE MULTI-LEVEL
BREIT-WIGNER FORMULA /2,3/ ARE ADJUSTED TO REPRODUCE THE
EXPERIMENTAL DATA OF B.ZEITNITZ ET AL./4/, AND GIVEN AS
POINT-WISE DATA. ABOVE 5.5 MEV, SMOOTH CURVE WAS OBTAINED
BY FITTING TO THE EXPERIMENTAL DATA OF B.ZEITNITZ ET AL.
MT=2 ELASTIC SCATTERING CROSS SECTION
BELOW 5.5 MEV, POINT-WISE CROSS SECTION OBTAINED FROM MLBW
CALCULATION IS GIVEN. ABOVE 5.5 MEV, THE CROSS SECTION
WAS OBTAINED BY SUBTRACTING THE REACTION CROSS SECTIONS
FROM THE TOTAL CROSS SECTION.
MT=4 TOTAL INELASTIC SCATTERING CROSS SECTION
SUM OF MT=51-66 AND 91.
MT=16,22,28,32,33,103,104,105,107
CALCULATED WITH GNASH /5/. THE OPTICAL POTENTIAL POTENTIAL
PARAMETERS, THE LEVEL DENSITY PARAMETERS AND THE LEVEL
SCHEME ARE SHOWN IN TABLES 1-3, RESPECTIVELY.
MT=51-91 INELASTIC SCATTERING
CALCULATED WITH CASTHY /6/. THE PARAMETERS ARE ALSO SHOWN
IN TABLES 1-3.
MT=102 CAPTURE CROSS SECTION
BELOW 5.5 MEV, POINT-WISE CROSS SECTION OBTAINED FROM MLBW
CALCULATION IS GIVEN. ABOVE 5.5 MEV, THE CROSS SECTION
WAS OBTAINED BY CASTHY CALCULATION.
MT=251 MU-BAR
CALCULATED FROM THE DATA IN MF=4.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2,51-66
BASED ON THE CASTHY CALCULATION.
MT=16,22,28,32,33,91
ASSUMED TO BE ISOTROPIC IN THE CENTER OF MASS SYSTEM.
MF=5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16,22,28,32,33,91
BASED ON THE GNASH CALCULATION.
MF=12-15 GAMMA-RAY DATA
BASED ON THE GNASH CALCULATION. FOR MF=12,MT=102,
MODIFICATION WAS DONE FOR ENERGY BALANCE.
TABLE 1 THE OPTICAL POTENTIAL PARAMETERS
------------------------------------------------------------------
NEUTRON V = 50.08-0.012E MEV R0 = 1.22 FM A0 = 0.66 FM
WS = 8.91+0.618E MEV RI = 1.45 FM AI = 0.13 FM
VSYM= 5.50 MEV R0 = 1.15 FM A0 = 0.50 FM
PROTON V = 51.30-0.220E MEV R0 = 1.21 FM A0 = 0.61 FM
WS = 6.40-0.050E MEV RI = 1.03 FM AI = 0.53 FM
VSYM= 6.00 MEV R0 = 1.06 FM A0 = 0.53 FM
DEUTERON PEREY-PEREY'S POTENTIAL/7/
TRITON BECCHETTI-GREENLEES'S POTENTIAL/8/
ALPHA V = 43.9 MEV R0 = 1.91 FM A0 = 0.45 FM
WV = 3.85 MEV RI = 1.91 FM AI = 0.45 FM
------------------------------------------------------------------
TABLE 2 THE LEVEL DENSITY PARAMETERS
-------------------------------------------------------
A(1/MEV) T(MEV) PAIR.(MEV) EX(MEV)
-------------------------------------------------------
B-11 1.431 6.149 2.67 25.58
B-12 1.491 6.201 0.0 26.78
C-12 1.700 5.971 5.60 37.91
C-13 1.846 5.382 2.80 30.57
C-14 1.988 4.887 5.00 28.94
C-15 1.988 4.600 0.0 19.28
N-14 1.600 5.000 0.0 10.00
N-15 2.130 3.758 2.20 10.07
N-16 2.130 4.547 0.0 22.11
-------------------------------------------------------
TABLE 3 THE LEVEL SCHEME (ENERGY(MEV), SPIN AND PARITY)/3,9,10/
------------------------------------------------------------------
N-14 N-15 N-16 C-15 C-14 C-13
------------------------------------------------------------------
GS 0.0 1+ 0.0 1/2- 0.0 2- 0.0 1/2+ 0.0 0+ 0.0 1/2-
1 2.313 0+ 5.270 5/2+ 0.120 0- 0.740 5/2+ 6.094 1- 3.089 1/2+
2 3.948 1+ 5.299 1/2+ 6.589 0+ 3.685 3/2-
3 4.915 0- 6.324 3/2- 6.728 3- 3.854 5/2+
4 5.106 2- 7.155 5/2+ 6.903 0-
5 5.691 1- 7.301 3/2+ 7.012 2+
6 5.834 3- 7.567 7/2+ 7.341 2-
7 6.204 1+ 8.313 1/2+ ---------------------------------------
8 6.446 3+ 8.571 3/2+ C-12 B-11 B-12
9 7.029 2+ 9.050 1/2+ ---------------------------------------
10 9.152 3/2- GS 0.0 0+ 0.0 3/2- 0.0 1+
11 9.155 5/2+ 1 2.125 1/2- 0.953 2+
12 9.225 1/2- 2 4.445 5/2- 1.674 2-
13 9.758 5/2- 3 5.020 3/2- 2.620 1-
14 9.829 7/2- 4 6.743 7/2- 2.720 0+
15 9.928 3/2- 5 6.793 1/2+
16 10.070 3/2+ 6 7.286 5/2+
------------------------------------------------------------------
REFERENCES
1) FUKAHORI T.: JAERI-M 89-047 (1989).
2) MUGHABGHAB S.F. ET AL. : 'NEUTRON CROSS SECTIONS' VOL.1 PART A
(ACADEMIC PRESS 1981, NEW YORK)
3) AJZENBERG-SELOVE F.: NUCL. PHYS. A460 (1986) 1
4) ZEITNITZ B. ET AL.: KFK-1443 (1971)
5) YOUNG P.G. ET AL.: GNASH, A PREEQUILIBRIUM,STATISTICAL
NUCLEAR-MODEL CODE FOR CALCULATION OF CROSS SECTION AND
EMISSION SPECTRA, LA-6947 (1977).
6) IGARASI S. AND FUKAHORI T.: JAERI 1321 (1991).
7) PEREY F.G.: PHYS. REV. 131 (1963) 745
8) BECCHETTI JR. F.D. AND GREENLEES G.W.: 'POLARIZATION PHENOMENA
IN NUCLEAR REACTIONS', THE UNIVERSITY OF WISCONSIN PRESS
(1971)
9) AJZENBERG-SELOVE F.: NUCL. PHYS. A449 (1986) 1
10) AJZENBERG-SELOVE F.: NUCL. PHYS. A433 (1985) 1