5-B - 11
5-B - 11 JAERI EVAL-MAY88 T.FUKAHORI
JAERI-M 89-046 DIST-MAR02 REV2-FEB02 20020214
----JENDL-3.3 MATERIAL 528
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 Newly evaluated by T.Fukahori (jaeri)
88-05 Revised by T.Fukahori (jaeri)
(n,d),(n,nd),(n,t),(n,nt) and (n,n2a) added
01-07 Total cross section was revised above 14 MeV.
Compiled by K.Shibata for JENDL-3.3.
***** modified parts for JENDL-3.3 **********************
(1,451) Updated.
(3,1) Revised above 14 MeV.
(3,2) Re-calculated.
(3,251) Deleted.
(4,2) Transformation matrix deleted.
(5,16-91) INT=22
(33,1-102) Taken from JENDL-3.2 covariance file.
***********************************************************
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 Resonance parameters
mt=151 Only scattering radius is given.
mf=3 Cross sections
2200 m/sec cross sections and resonance integrals
2200 m/sec res. integ.
total 5.050 b -
elastic 5.045 b -
capture 5.075 mb 2.542 mb
mt=1 Total cross section
Below 1 MeV, calculated with the multi-level Breit-Wigner
formula and the resonance parameters taken from ref. /1/.
In the range of 1 to 4 MeV, based on the R-matrix
calculation which was performed by using Koehler et al.'s
parameters /2/. Above 4 MeV, smooth curve was obtained by
fitting to the experimental data of Auchampaugh et al./3/.
****** JENDL-3.3 ****************************************
Above 14 MeV, the optical model calculations were performe
using the parameter set of Glendinning et al./12/
The calculated values were normalized to the JENDL-3.2
value at 14 MeV.
**********************************************************
mt=2 Elastic scattering cross section
Below 1 MeV based on the multi-level Breit-Wigner formula.
In the range of 1 to 2.2 MeV, the R-matrix calculation was
adopted. Above 2.2 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=51-57 and 91.
mt=16 (n,2n)B-10 cross section
Calculated with gnash /4/. The optical potential
parameters, the level density parameters and the level
scheme are shown in Tables 1-3, respectively.
mt=22 (n,n'alpha)Li-7 cross section
Calculated with gnash. The optical potential parameters,
the level density parameters and the level scheme are
shown in Tables 1-3, respectively.
mt=28 (n,n'p)Be-10 cross section
Based on the gnash calculation. The parameters used are
listed in Tables 1-3.
mt=29 (n,n'2alpha)t cross section
Based on (n,n't) cross section of the gnash calculation
and normalized to he production cross section of Kneff
et al. /5/.
mt=32 (n,n'd)Be-9 cross section
Based on the gnash calculation. The parameters used are
listed in Tables 1-3.
mt=33 (n,n't)Be-8 cross section
Based on the gnash calculation. The parameters used are
listed in Tables 1-3.
mt=51 Inelastic scattering
The R-matrix calculation with Koehler et al.'s parameters
was adopted below 7 MeV. Above 7 mev, the gnash and DWBA
calculations were performed. The sum of both results
was adopted, and normalized to the experimental data of
Koehler et al. /2/ and Glendinning et al. /6/.
mt=52,53 Inelastic scattering
Below 7 MeV, based on the R-matrix calculation with
the searched parameters. Above 7 MeV, the sum of the gnash
and DWBA calculations was adopted, and fitted to the
experimental data of Glendinning et al..
mt=54-57 Inelastic scattering
The sum of results of the gnash and DWBA calculations was
normalized to be the result of Oktavian's ddx data /7/.
mt=91 Continuum inelastic scattering
Above 7.2 MeV, continuum levels were adopted.
Based on the gnash calculation.
mt=102 Capture cross section
Calculated from the multi-level Breit-Wigner formula.
The direct capture /1/ is also considered.
mt=103 (n,p)Be-11 cross section
Based on the gnash calculation with being normalized to
the experimental data of Stepancic et al. /8/. The
parameters used are shown in Tables 1-3, respectively.
mt=104 (n,d)Be-10 cross section
Based on the gnash calculation.
mt=105 (n,t)Be-9 cross section
Based on the gnash calculation.
mt=107 (n,alpha)Li-8 cross section
The gnash calculation was performed, and normalized to the
experimental data of Antolkovic et al. /9/ and
Scobel et al. /10/. The parameters used are shown in
Tables 1-3, respectively.
mf=4 Angular distributions of secondary neutrons
mt=2
The R-matrix and DWBA calculations were adopted below
8 MeV and above 8 MeV, respectively.
mt=16,22,28,29,32,33,91
Assumed to be isotropic in the center of mass system.
mt=51,52,53
Below 8 MeV based on R-matrix calculation. Above 8 MeV,
based on the DWBA and the gnash calculations.
mt=54,55,56,57
Based on the DWBA and the gnash calculations.
mf=5 Energy distributions of secondary neutrons
mt=16,22,28,29,32,33,91
Based on the gnash calculation.
mf=12-15 Gamma-ray data
Based on the gnash calculation.
mf=33 Covariances of cross sections (ref. 19)
mt=1
Based on experimental data. A chi-value was 6.212.
mt=2
Constructed from mt=1 and 102.
mt=102
Based on experimental data. A chi-value was 1.406.
Table 1 The optical potential parameters
------------------------------------------------------------------
neutron V = 41.8-0.005E MeV* r0= 1.40 fm a0= 0.35 fm ref.12
Ws= 1.01E MeV* ri= 1.15 fm* ai= 0.50 fm
proton V = 66.1-0.273E MeV r0= 1.15 fm a0= 0.57 fm ref.13
Ws= 1.50+0.581E MeV ri= 1.15 fm ai= 0.5 fm
Vsym = 5.5 MeV r0= 1.15 fm a0= 0.57 fm
deuteron V = 80.0 MeV* r0= 1.0 fm* a0= 1.0 fm* ref.14
Wv= 30.0 MeV ri= 1.0 fm* ai= 0.8 fm*
Vsym = 6.0 MeV* r0= 1.0 fm* a0= 1.0 fm*
triton V = 103.0+20.0E MeV* r0= 0.85 fm a0= 0.70 fm ref.15
Wv= 1.49E MeV* ri= 2.06 fm ai= 0.72 fm
Vsym = 8.55 MeV* r0= 0.85 fm a0= 0.70 fm
alpha V = 285.2-2.40E MeV* r0= 1.61 fm* a0= 0.55 fm* ref.16
Ws= 16.16-0.70E MeV* ri= 1.81 fm ai= 0.65 fm
------------------------------------------------------------------
note : E is incident neutron energy in lab. system.
* means that parameter is modified from original one.
Table 2 The level density parameters
---------------------------------------------------------
a(1/MeV) t(MeV) pair.(MeV)
---------------------------------------------------------
B-10 1.196 7.990 0.0
B-11 1.431 6.112 2.67
B-12 1.491 6.201 0.0
Be-8 1.115 9.187 5.13
Be-9 1.125 8.248 2.46
Be-10 1.088 10.029 5.13
Be-11 1.419 7.277 2.46
Li-7 1.138 7.197 2.67
Li-8 1.115 8.170 0.0
---------------------------------------------------------
Table 3 The level scheme (energy(MeV), spin and parity) /17-18/
------------------------------------------------------------------
B-10 B-11 Be-10 Be-11 Li-7 Li-8
------------------------------------------------------------------
gs 0.0 3+ 0.0 3/2- 0.0 0+ 0.0 1/2+ 0.0 3/2- 0.0 2+
1 0.718 1+ 2.125 1/2- 3.368 2+ 0.320 1/2- 0.478 1/2- 0.981 1+
2 1.740 0+ 4.445 5/2- 5.958 2+ 4.630 7/2-
3 2.154 1+ 5.020 3/2- 5.960 1- 6.680 5/2-
4 3.587 2+ 6.743 7/2- 6.179 0+ 7.460 5/2-
5 4.774 3+ 6.792 1/2+ 6.263 2- 9.670 7/2-
6 5.110 2- 9.120 7/2+ 7.371 3- 9.850 3/2-
7 5.164 2+ 10.60 7/2+ 7.452 2+ 11.240 3/2-
8 5.180 1+ 9.270 4-
9 5.926 2+ 9.400 2+
10 6.025 4+
11 6.127 3-
12 6.561 4-
13 6.873 1-
14 7.002 2+
15 7.430 2-
16 7.467 1+
17 7.479 2+
18 7.561 0+
19 7.670 1+
20 7.819 1-
21 8.070 2+
22 8.700 2+
23 8.889 3-
24 8.895 2+
------------------------------------------------------------------
References
1) Mughabghab S.F. et al. : 'Neutron Cross Sections' Vol.1
Part A (academic press 1981, new york)
2) Koehler P.E. et al.: Nucl. Phys. A394 (1983) 221
3) Auchampaugh G.F. et al.: Nucl. Sci. Eng. 69 (1979) 30
4) Young P.G. et al.: GNASH, a preequilibrium,statistical
nuclear-model code for calculation of cross section and
emission spectra, LA-6947 (1977).
5) Kneff D.W. et al.: Nucl. Sci. Eng. 92 (1986) 491
6) Glendinning S.G. et al.: Bull. Am. Phys. Soc. 24 (1979) 656
7) Takahashi A. et al.: INDC(JPN)-103/L (1986)
8) Stepancic B.Z. et al.: Bull. Inst. Boris Kidric 17 (1966) 237
9) Antolkovic B. et al.: Nucl. Phys. A325 (1979) 189
10) Scobel W. et al.: Zeitschrift f. Naturforschung, Section A
25 (1970) 1406
11) Cookson J.A. et al.: Nucl. Phys. A146 (1970) 417
12) Glendinning S.G. et al.: Nucl. Sci. Eng. 80 (1982) 256
13) Watson B.A. et al.: Phys. Rev. 182 (1969) 977
14) Miljanic D. et al.: Nucl. Phys. A176 (1971) 110
15) Herling G.H. et al.: Phys. Rev. 178 (1969) 178
16) Matsuki S. et al.: J. Phys. Soc. Japan 26 (1969) 1344
17) Ajzenberg-Selove F. : Nucl. Phys. A413 (1984) 1
18) Ajzenberg-Selove F. : ibid. A433 (1985) 1
19) Shibata K. et al.: JAERI-Research 98-045 (1998).