24-CR- 50 NEDAC EVAL-MAR87 T.ASAMI(NEDAC)
DIST-MAR02 REV3-DEC01 20011226
----JENDL-3.3 MATERIAL 2425
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 New evaluation was made by T.Asami.
88-12 mf/mt=3/107 modified.
93-09 JENDL-3.2.
Compiled by T.Nakagawa (ndc/jaeri)
00-03 Reevaluation was made by T.Asami.
01-11 Compiled by K.Shibata (ndc/jaeri)
***** modified parts for JENDL-3.3 ********************
(1,451) updated
(2,151) revised
(3,2) re-calculated
(3,22,28,102,103,107) revised
(3,104,105,111, 203,207) evaluated newly
(3,251) deleted
(4,2) trasnformation matrix deleted
(4,16,22,28,91) deleted
(5,16,22,28,91) deleted
(6,16,22,28,91) taken from JENDL fusion file
(6,203, 207) taken from JENDL fusion file
(12,16-107) evaluated newly
(14,16-107) isotropic distribution
(15,16-107) evaluated newly
***********************************************************
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 Resonance parameters
mt=151 Resolved resonance parameters
Resolved parameters for Reich-Moore formula were given in the
energy region from 1.0e-5 eV to 600 keV. Evaluation was based
on the experimental data of Stieglitz+71/4/, Beer+74/5/,
Allen+77/6/, Kenny+77/7/ and Brusegan+86/8/.
Effective scattering radius =5.0 fm /9/.
calculated 2200 m/s cross sections and resonance integral.
2200 m/s cross section(b) res. integral(b)
elastic 2.28
capture 16.0 7.50
total 18.3
mf=3 Neutron cross sections
Below 600 keV, zero background cross section was given.
mt=1 Total
Below 600 keV, given by the resonance parameters
Above 600 keV, optical and statistical model calculation was
made with the casthy code/10/.
The optical potential parameters used are:
V = 46.78 - 0.262*En, Vso = 7.0 (MeV)
Ws = 4.87 + 0.352*En, Wv = 0 (MeV)
r = 1.30, rs = 1.40, rso = 1.30 (fm)
a = 0.55, b = 0.40, aso = 0.48 (fm)
Surface imaginary part is in derivative Woods-Saxon form.
mt=2 Elastic scattering
Obtained by subtracting the sum of the partial cross sections
from the total cross section.
mt=4, 51-55, 91 inelastic scattering
Calculated with the casthy code/10/, taking account of the
contribution from the competing processes and using the
discrete level data/3/ shown below. The contributions from
the direct process for the level marked with '*' were calcula-
ted with the dwuck code/11/. The deformation parameters used
in the calculation were assumed based on Peterson's data/12/.
level energy(MeV) spin-parity
g.s. 0.0 0+
1 0.7833 2+ *
2 1.8814 4+ *
3 2.9245 2+ *
4 3.1611 2+ *
5 3.1641 6+
6 3.3247 4+
7 3.5946 4+
8 3.6101 4+
9 3.6295 1+
10 3.6940 0+
11 3.6978 2+
12 3.7924 5+
13 3.8261 6+
14 3.8443 3+
15 3.8500 0+
16 3.8752 6+
17 3.8953 2+
18 3.8983 4+
19 3.9377 3+
20 4.0517 0+
Levels above 3.5946 MeV were assumed to be overlapping.
The calculated data for the inelastic scattering were finally
lumped for the convenience on the construction of the elementa
data as follows:
mt no. level energy(mev) lumping of level
51 0.7833 1
52 1.8814 2
53 2.9245 3
54 3.1611 4-5
55 3.3247 6
91 3.5946 over 7
Furthermore, the data of mt=51 were modified by considering
experimental data. The total inelastic scattering cross sec-
tion (mt=4) is the sum of mt's from 51 to 91.
mt=16 (n,2n)
Mainly based on the experimental data of Bormann /13/.
mt=22 (n,na)
Obtained from from the sincros-ii calculation made with the
the egnash code/2/.
mt=28 (n,np)
Oobtained from from the sincros-ii calculation made with the
the egnash code/2/.
mt=102 capture
Below 600 keV, given by the resonance parameters
Above 600 keV, calculated with the casthy code/10/ and
normalized to reproduce the element data of 10 mb at 50 keV,
and added the semidirect component calculated with the quick
gnash code/16,17/.
mt=103,104,105,106,107,111 (n,p),(n,d),(n,t),(n,He3),(n,a)
(n,2p)
Obtained from from the sincros-ii calculation made with the
the egnash code/2/.
mt=203 Total proton production
sum of mt=28 and 103.
mt=207 Total alpha production
sum of mt=22 and 107.
mf=4 Angular distributions of secondary neutrons
mt=2 Elastic scattering
Calculated with the casthy code/10/.
mt=51-55 inelastic scattering
Calculated with the casthy code and the dwuck code/12/.
mf=6 Energy-angle distributions of secondary particles
mt=16, 22, 28, 91
Based on modified kumabe's systematics/1/.
mt=203, 207
Based on Kalbach's 1988 systematics/14/.
mf=12 Photon production multiplicities and transition probability
arrays
mt=16, 22, 28, 51-55, 91,103, 104, 107
mt=51-55 were given as the transition probability arrays.
mt=16, 22, 28, 91, 102, 103, 104, 107 were calculated with
the egnash code/2/ and processed by the gamfil2 code/15/.
mt=102 was calculated with the casthy code/10/.
mf=14 photon angular distributions
mt=16, 22, 28, 51-55, 91, 102, 103, 104, 107
Assumed to be isotropic distributions
mf=15 Continuous photon energy spectra
mt=16, 22, 28, 91, 103, 104, 107
Calculated with the egnash code/2/.
mt=102
Calculated with the casthy code/10/.
References
1) Chiba S. et al.: JAERI-M 92-027, p.35 (1992).
2) Yamamuro N.: JAERI-M 90-006 (1990).
3) ENSDF: Evaluated Nuclear Structure Data File, BNL/NNDC.
4) Stiegliz R.G. et al. : Nucl. Phys. A163, 592 (1971).
5) Beer H. and Spencer R.P. : KfK-2063 (1974), also Nucl.
Phys. A240, 29 (1975).
6) Allen B.J. and Musgrove A.R.de L. : Neutron Data of
Structural Materials for FBR, 1977 Geel meeting, p.447,
Pergamon Press (1979).
7) Kenny M.J. et al. : AAEC/E-400 (1977).
8) Brusegan A. et al. : 85 Santa Fe vol.1 p.633 (1986).
9) Mughabghab S.F. et al. : "Neutron Cross Sections", Vol.1,
Part A (1981).
10) Igarasi S. and Fukahori T.: JAERI 1321 (1991).
11) Kunz P.D. : unpublished.
12) Peterson R.J. and Perlman, D.E.: Nucl. Phys. A117,185(1968).
13) Bormann M. : Taken from EXFOR (1965).
14) Kalbach C. : Phys. Rev. C37, 2350(1988).
15) Hida K.: JAERI-M 86-150 (1986) (in Japanese).
16) Young P.G. et al. : LA-12343-MS (1992).
17) Koning A.J. and Delaroche J.P. : ECN-RX-98-015 (1998).