80-Hg-199 JNDC EVAL-SEP97 K.SHIBATA, T.FUKAHORI, S.CHIBA,+
JNST 34, 1171 (1997) DIST-MAY10 20100125
----JENDL-4.0 MATERIAL 8034
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
97-09 Evaluation was performed for JENDL-3.3.
97-10 Compiled by T.Fukahori (jaeri).
99-04 Comments were added by T.Fukahori
01-07 Modified by K.Shibata for JENDL-3.3.
(3,251) deleted.
(4,2) transformation matrix deleted.
(5,16-91) INT=22.
10-01 Modified by K.Shibata for JENDL-4.0.
(1,451) Updated.
(2,151) Unresolved parameters added.
(3,1) Re-calculated from partial cross sections.
(3,4) Re-calculated from partial cross sections.
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 Resonance parameters
mt=151 Resolved resonances
Resonance region = 1.0e-5 eV to 968 eV
Parameters for the multilevel Breit-Wigner formula
were adopted from the compilation by Mughabghab+ /1/.
R=10.3 fm was selected to reproduce the thermal elastic
scattering cross section of natural mercury measured by
Hibdon+ /2/.
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For JENDL-4.0, the unresolved resonance parameters were
obtained so as to reproduce the total and capture cross
sections in the energy region from 968 eV to 200 keV.
The parameters should be used only for self-shielding
calculations.
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calculated 2200-m/s cross sections and res. integrals.
2200-m/s res. integ.
elastic 67 b -
capture 2149 b 438 b
total 2216 b
mf=3 Neutron cross sections
mt=1 Total
Below 968 eV , no background cross section was given.
Spherical optical model calculation was made by
casthy code /3/ above 968 eV. Modified Walter-Guss
potential parameters /4,5/ were used.
mt=2 Elastic scattering
Given as total minus nonelastic cross sections.
mt=16,17,22,28,103,104,107
(n,2n),(n,3n),(n,n'a),(n,n'p),(n,p),(n,d),(n,a)
Calculated by scincros-ii /4/ with the following
parameters.
optical potential parameters
neutron : modified Walter-Guss /4,5/
proton : combined Perey /6/ and Walter-Guss
alpha : Lemos /7/ modified by Arthur-Young /8/
deuteron: Lohr-Haeberli /9/
level density parameters
nuclei a(1/MeV) pair(MeV) t(MeV) Ex(MeV) Ec(MeV)
Hg-194 21.5 2.00 0.42 3.66 2.89
Hg-195 21.0 0.87 0.59 5.45 0.89
Hg-196 20.5 1.71 0.49 4.36 2.50
Hg-197 20.0 0.87 0.63 6.00 1.03
Hg-198 19.5 1.66 0.63 6.45 1.91
Hg-199 18.0 0.87 0.70 6.48 0.75
Hg-200 17.0 1.69 0.75 7.81 2.19
Hg-201 16.0 0.87 0.79 7.22 0.77
Hg-202 15.0 1.58 0.84 8.35 1.79
Hg-203 14.5 0.87 0.83 7.02 0.58
Hg-204 14.0 1.28 0.82 6.88 2.81
Hg-205 13.5 0.87 0.84 6.59 1.86
Au-195 21.0 0.84 0.57 5.05 1.11
Au-196 20.5 0.00 0.43 1.63 0.60
Au-197 19.6 0.79 0.58 4.70 1.26
Au-198 19.1 0.00 0.62 4.52 0.57
Au-199 18.0 0.82 0.65 5.52 1.16
Au-200 17.0 0.00 0.64 4.07 0.47
Au-201 15.5 0.71 0.73 5.53 0.90
Au-202 15.0 0.00 0.77 5.40 0.00
Au-203 14.0 0.41 0.82 6.01 0.00
Au-204 13.0 0.00 0.87 5.84 0.00
Pt-192 23.2 1.84 0.58 7.15 1.44
Pt-193 22.5 0.71 0.58 5.64 0.52
Pt-194 21.0 1.55 0.59 6.28 1.67
Pt-195 21.0 0.71 0.61 5.69 0.66
Pt-196 20.0 1.50 0.58 5.63 1.97
Pt-197 18.9 0.71 0.67 6.11 0.60
Pt-198 18.7 1.53 0.65 6.53 1.52
Pt-199 18.5 0.71 0.67 6.09 0.51
Pt-200 18.0 1.42 0.66 6.29 0.00
Pt-201 17.5 0.71 0.68 5.66 0.00
mt=4,51-63,91 Inelastic scattering
The casthy and sincros-ii calculations were adopted. The
direct-process component was considered for the low-lying
levels regarded /10/ as one resulting from weak
coupling of a neutron hole to a 2+ core vibration by the
DWBA theory. Deformation parameters were calculated by the
method in ref. /11/ and listed in the table below for
adopted levels.
The level scheme is given as follows:
no. energy(MeV) spin-parity deformation-parameter
g.s. 0.0 1/2 -
1. 0.1584 5/2 - L=2, beta=0.082
2. 0.2082 3/2 - L=2, beta=0.067
3. 0.4035 3/2 -
4. 0.4139 5/2 -
5. 0.4555 1/2 -
6. 0.4923 3/2 -
7. 0.53251 3/2 +
8. 0.6380 7/2 -
9. 0.6689 5/2 -
10. 0.6959 5/2 -
11. 0.7129 9/2 -
12. 0.7374 5/2 -
13. 0.7504 3/2 -
Continuum levels were assumed above 750 keV.
mt=102 Capture
Below 968 eV, no background cross section was given.
The casthy calculation was adopted above 968 eV.
mf=4 Angular distributions of secondary neutrons
mt=2,51-63
Optical and statistical-model calculations were adopted.
The DWBA calculations were added.
mt=16,17,22,28,91
Calculated with sincros-ii.
mf=5 Energy spectrum of secondary neutron
mt=16,17,22,28,91
Calculated with sincros-ii.
mf=12 Photon multiplicities and transition probability arrays
mt=16,17,22,28,51-63,91,102,103,104,107
Multiplicities were calculated with casthy and sincros-ii.
mf=14 Photon angular distributions
mt=16,17,22,28,51-63,91,102,103,104,107
Assumed to be isotropic.
mf=15 Photon energy spectra
mt=16,17,22,28,91,102,103,104,107
Calculated with casthy and sincros-ii.
References
1) Mughabghab S.F. et al.: "Neutron Cross Sections", Vol.1,
Part B, Academic Press (1984).
2) Hibdon C.T. et al.: Phys. Rev., 82, 560 (1951).
3) Igarasi S. and Fukahori T.: JAERI-1321 (1991).
4) Yamamuro N.: JAERI-M 90-006 (1990).
5) Walter R.L. and Guss P.P.: Proc. Int. Conf. on Nucl. Data
for Basic and Applied Sci., Santa Fe, May 13-17, 1985,
p.1079 (1986).
6) Perey F.G.: Phys. Rev., 131, 745 (1963).
7) Lemos O.F.: Orsay Rep., Ser. A. No. 136 (1972).
8) Arthur E.D. and Young P.G.: LA-8626-MS (1980).
9) Lohr J.M. and Haeberli W.: Nucl. Phys., A232, 381 (1974).
10) Schmorak M.R.: Nucl. Data Sheets, 53, 331 (1988).
11) Yiming Y. et al.: Nucl. Phys., A390, 449 (1982).