9-F - 19
9-F - 19 JAERI EVAL-JUL89 T.SUGI
DIST-MAY10 20090828
----JENDL-4.0 MATERIAL 925
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
===========================================================
The data were taken from JENDL-3.3.
===========================================================
HISTORY
83-11 Evaluation for JENDL-2 was performed by Sugi and Nishimura
(jaeri)/1/.
89-07 Resonance parameters and total cross section were
re-evaluated for JENDL-3.
89-07 Compiled by T. Narita (jaeri).
94-06 JENDL-3.2.
Gamma prodction data modified by T.Asami (Data Eng.).
Other data were mainly adopted from JENDL fusion file.
Compiled by T.Nakagawa (ndc/jaeri)
***** Modified parts for JENDL-3.2 ********************
(3,2), (3,4), (3,22), (3,28), (3,52-91), (3,104), (3,251)
All angular distributions
All energy distributions
New evaluation fot gamma-ray production data
***********************************************************
-------------------------------------------------------------
JENDL fusion file /2/ (as of Jun. 1994)
Evaluated and compiled by S.Chiba (ndc/jaeri).
The calculations have been carried out with the sincros-II
code system (dwucky, egnash and casthy2y) /3/. the
following set of omps were selected:
n : Yamamuro (modified Walter-Guss) /3/
p : Perey and Walter-Guss combined /4/
d : Lohr-Haeberli /5/
t : Becchetti-Greenlees /6/
he-3 : Becchetti-Greenlees /6/
alpha : Lemos set modified by Arthur-Young /7/
The following values of level density parameters (1/MeV)
were used to reproduce the ddx at 14 MeV:
F-20 F-19 F-18 O-19 O-18 O-17 N-17 N-16 N-15 N-14 C-15 C-14
4.49 3.50 2.50 2.50 3.00 2.99 3.51 2.00 2.00 2.03 2.84 2.46
The data were taken from JENDL-3.1 except for the following:
mf=3, mt= 2: adjusted to conserve the total c.s.
mf=3, mt= 3: calculated as a sum of reaction c.s.
mf=3, mt= 4: calcaulated as a sum of inelastic c.s.
mf=3, mt=22, 28, 32, 91 : taken from the sincros-II
calculation
mf=3, mt=52: replaced by the sincros-II calculation above
2.5 mev
mf=3, mt=53-60: replaced by the sincros-II calculation
mf=3, mt=203,204,205,207: taken from the sincros-II calc.
mf=4, mt= 2: repalced by the sincros-II calculation
mf=6, mt=22, 28, 32, 91 : taken from the sincros-II
calculation. Kumabe's systematics was used.
mf=6, mt=203,204,205,207: taken from the sincros-II
calculation. Kalbach's systematics was used.
-------------------------------------------------------------
00-10 JENDL-3.3
Compiled by K.Shibata (jaeri).
***** Modified parts for JENDL-3.3 ************************
(1,451) Updated.
(3,203-207) Calculated.
(3,251) Deleted.
(4,2) Transformation matrix deleted.
(4,16-28) Deleted.
(5,16-28) Deleted.
(6,16-28) Taken from JENDL fusion file.
(6,203-207) Taken from JENDL fusion file.
************************************************************
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 Resonance parameters
mt=151 Resolved resonance parameters : 1.0e-5 eV - 100 keV
The multi-level Breit-Wigner formula was used.
Res. energies and gam-n : The first two levels were based on
Johnson et al. /8/. The 3rd and 4th levels were adjusted
so as to fit to the experimental data of Larson et al./9/
Gam-g : The first three levels were based on Macklin and
Winters /10/. The 4th level was adjusted so as to fit to
the recommended thermal capture cross section of
Mughabghab et al./11/.
Scattering radius: 5.525 fm
calculated 2200-m/s cross sections and res. integrals.
2200 m/s res. integ.
elastic 3.643 b -
capture 9.6 milli-b 19.5 milli-b
total 3.652 b -
mf=3 Neutron cross sections
mt=1 Total cross section
Below 100 keV: no background.
Above 100 keV: based on the experimental data of Larson et
al./9/
mt=2 Elastic scattering cross section
Derived by subtracting the nonelastic cross section from
the total cross section.
mt=4 Total inelastic scattering cross section
Sum of mt=51-60,91.
mt=16 (n,2n) cross section
Calculated by fitting the Pearlstein's function /12/ to the
experimental data.
mt=22 (n,n' alpha) and (n,alpha n') cross sections
Calculated by the sincros-II code system.
mt=28 (n,n' p) and (n,p n') cross sections
Calculated by the sincros-II code system.
mt=32 (n,n'd) cross secton
Calculated by the sincros-II code system.
mt=51-60 Inelastic scattering cross sections
mt=51 (taken from JENDL-3.1)
Up to 1 MeV : based on the experimental data of Broder
et al. /13/.
1 MeV - 5.5 MeV : calculated with the Hauser-Feshbach
method (eliese-3 /14/) taking into account
(n,alpha) and (n,p) as competing processes. The
level scheme of F-19, N-16 and O-19 was taken from
Ajzenberg-Selove /15,16/. The optical potential
parameters are :
V = 51.56 - 1.492*E (MeV),
Ws = 11.82 (MeV),
Vso= 10.0 (MeV),
r0 = rs = rso = 1.31 (fm),
a = aso = 0.66 (fm),
b = 0.47 (fm).
The level density parameter of 3.609 (1/MeV)/17/ and
pairing energy of 2.52 MeV /18/ were used.
mt=52
Up to 2.5 MeV: taken from JENDL-3.1, which is based on the
data of Broder et al. /13/.
Above 2.5 MeV: calculated by the sincros-II code system.
mt=53 - 60
Calculated by the sincros-II code system.
The sincros-II calculation adopted the following discrete
levels. The levels with L and Beta-L include the
contribution of direct inelastic scattering, which was
calculated assuming the weak-coupling model by the DWBA
method:
----------------------------------------------
mt ex(MeV) spin-parity L beta-L
----------------------------------------------
2 0.0 1/2+
51 0.1099 1/2-
52 0.1972 5/2+ 2 0.4
53 1.3457 5/2-
54 1.4585 3/2-
55 1.5541 3/2+ 2 0.6
56 2.7798 9/2+ 4 0.4
57 3.9071 3/2+
58 3.9985 7/2-
59 4.0325 9/2-
60 4.3777 7/2+ 4 0.4
----------------------------------------------
mt=91 Inelastic to continuum
Calculated with sincros-II code system.
mt=102 Capture cross section
Below 100 keV : no background.
100 keV - 1.87 MeV : based on the experimental data of
Gabbard et al. /19/.
1.87 MeV - 20 MeV : assumed to decrease with 1/v law.
mt=103 (n,p) cross section
Up to 9 MeV : based on the experimental data of Bass et
al. /20/.
9 MeV - 20 MeV : calculated with the statistical model by
using Pearlstein' empirical formula.
mt=104 (n,d) cross section
Calculated by the sincros-II code system.
mt=105 (n,t) cross section
Calculated by the sincros-II code system.
mt=107 (n,alpha) cross section
Below 9 MeV, based on the following experimental data:
Up to 4MeV Davis et al. /21/,
4MeV - 5.5MeV Smith et al. /22/,
5.5MeV - 9MeV Bass et al. /20/.
Above 9 MeV, calculated with the Pearlstein's formula.
mt=203 Total proton production
Sum of mt=28 and 103.
mt=204 Total deuteron production
Sum of mt=32 and 104.
mt=205 Total triton production
Equal to mt=105.
mt=207 Total alpha production
Sum of mt=22 and 107.
mf=4 Angular distributions of secondary neutrons
mt=2
Calculated with optical model by the sincros-II code system.
mt=51-60
Calculated by the sincros-II code system.
mf=6 Energy-angle distributions of secondary particles
mt=16,22,28,32,91
Calculated usingt the sincros-II code system and Kumabe's
systematics /23/.
mt=203,204,205,207
Based on Kalbach's systematics/24/.
mf=12 Photon production multiplicities
mt=51-60, 102, 103, 107
Calculated with the gnash code /7/.
mf=13 Photon production cross sections
mt=3
Calculated with the gnash code/7/.
mf=14 Photon angular distributions
mt=3,51-60,102,103,107
Isotropic
mf=15 Photon energy distributions
mt=3,102,103.107
Calculated with the gnash code/7/.
References
1) Sugi T. and Nishimura K.: JAERI-M 7253 (1977), English trans-
lation : ORNL-TR-4605.
2) Chiba, S. et al.: JAERI-M 92-027, p.35(1992).
3) Yamamuro, N.: JAERI-M 90-006 (1990).
4) Walter, R.L. and Guss, P.P.: Int. Conf. on Nucl. Data for
Basic and Applied Science, Santa Fe, p.1079 (1986).
5) Lohr, J.M. and Haeberli, W.: Nucl. Phys. A232, 381 (1974).
6) Becchetti, F.D. and Greenlees, G.W.: "Polarization Phenomena
in Nuclear Reactions", Univ. of Wisconsin Press, p.682
(1971).
7) Arthur, E.D. and Young, P.G.: LA-8626-MS (1980).
8) Johnson C.H. et al.: ORNL-5025 (1975).
9) Larson D.C. et al.: ORNL/TM-5612 (1976).
10) Macklin R.L. and Winters R.R.: Phys. Rev. C7, 1766 (1973).
11) Mughabghab S.F. et al.: Neutron Cross Sections, Vol.1, Part A,
Z=1-60, Academic Press (1981).
12) Pearlstein S.: Nucl. Sci. Eng. 23, 238 (1965).
13) Broder et al.: 70 Helsinki Conf. 2, 295 (1970).
14) Igarasi S.: JAERI 1224 (1972).
15) Ajzenberg-Selove F.: Nucl. Phys. A166, 1 (1971).
16) Ajzenberg-Selove F.: Nucl. Phys. A190, 1 (1972).
17) Abdelmalek N.N. and Stavinsky V.S.: Nucl. Phys. 58, 601 (1964)
18) Newton T.D.: Can. J. Phys. 34, 804 (1956).
19) Gabbard F. et al.: Phys. Rev. 114, 201 (1959).
20) Bass R. et al.: EANDC(E) 66-64.
21) Davis E.A. et al.: Nucl. Phys. 27, 448 (1961).
22) Smith D.L. et al.: Phys. Rev. 117, 514 (1960).
23) Kumabe, I. et al.: Nucl. Sci. and Eng., 104, 280 (1990).
24) Kalbach C. : Phys. Rev. C37, 2350(1988).