25-Mn- 55
25-MN- 55 JAERI,MAPI EVAL-MAR87 K.SHIBATA,T.HOJUYAMA
NST 26, 955 (1989) DIST-MAR02 REV3-FEB02 20020214
----JENDL-3.3 MATERIAL 2525
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 Resonance parameters were evaluated by T.Hojuyama (mapi).
Multistep Hauser-Feshbach calculations were performed
by K.Shibata (jaeri).
88-01 Compiled by K.Shibata (jaeri).
88-03 Covariance data added
91-08 Modifed by B.Yu (ciae) and S.Chiba (ndc/jaeri) as follows
for JENDL fusion file/20/.
Compiled by B.Yu.
Cross sections were mainly taken from JENDL-3.1. The (n,n')
continumm cross section (mt=91) in the whole energy region and
its spectra were taken from the sincros-II /21/ calculation.
Several discrete level scattering cross sections (mt=67, 68, 69,
70, 71, 72, 73, 74, 75, 76, 77, 78, 79) and their angular distri-
butions were deleted as well as their covariance matrices
because they are included in the new continuum inelastic
scattering cross section taken from the sincros-II calculation.
93-08 JENDL-3.2
File-6 of the JENDL fusion file was converted to files 4
and 5.
Data were compiled by K. Shibata (jaeri).
02-01 Compiled by K.Shibata for JENDL-3.3.
***** Modified parts for JENDL-3.3 ****************************
(1,451) Updated
(3,3) Deleted
(3,203-207) Calcualted
(3,251) Deleted
(4,2) Transformation matrix deleted
(4,16),(4,22), Deleted
(4,28),(4,91) Deleted
(5,16-91) Deleted
(6,16-91) Taken from JENDL fusion file
(6,203-207) Taken from JENDL fusion file
(12,102) Modified
(15,102) Experimental data were inserted for
En = 14-559 keV.
(33,2) Taken from JENDL-3.2 covariance file.
****************************************************************
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 Resonance parameters
mt=151 Resolved resonance parameters for MLBW formula
The parameters of the lowest four resonances were taken
from the work of Macklin /1/. Others were taken from the
compilation of Mughabghab et al./2/ except that the
parameters of two negative resonances were adjusted so as
to fit to experimental thermal cross sections.
Resonance region : 1.0e-5 eV to 100 keV.
Scattering radius: 5.15 fm
Calculated 2200-m/s cross sections and res. integrals
2200-m/s res. integ.
elastic 2.167 b -
capture 13.413 b 11.77 b
total 15.579 b -
mf=3 Neutron cross sections
mt=1 Total
Below 100 keV : No background
Above 100 keV : Based on the experimental data /3,4,5/.
mt=2 Elastic scattering
(total) - (nonelastic cross section)
mt=4,51-66,91 Inelastic scattering
Statistical-model calculations were performed using the
tng code /6/. The precompound process was considered
above 5 MeV. The calculated cross section of mt=51
was multiplied by a factor of 1.2.
For the levels of mt=51,52,57,61,64,65,67,70,
the direct process components were taken into account
by the DWBA calculations.
The optical potential parameters used are as follows/7/
(in the units of MeV and fm):
V = 49.747 - 0.4295*E - 0.0003*E**2 r0 = 1.287 a0 = 0.56
Ws = 11.2 - 0.09*E rs = 1.345 as = 0.47
Vso= 6.2 rso= 1.120 aso = 0.47
The level scheme was taken from ref./8/.
no. energy(MeV) spin-parity
g.s. 0.0 5/2 -
1. 0.126 7/2 -
2. 0.984 9/2 -
3. 1.290 1/2 -
4. 1.292 11/2 -
5. 1.293 1/2 -
6. 1.528 3/2 -
7. 1.884 7/2 -
8. 2.015 7/2 -
9. 2.198 7/2 -
10. 2.215 5/2 -
11. 2.252 3/2 -
12. 2.267 5/2 -
13. 2.312 13/2 -
14. 2.366 5/2 -
15. 2.398 9/2 +
16. 2.427 1/2 +
17. 2.563 3/2 -
18. 2.727 7/2 -
19. 2.753 5/2 -
20. 2.822 9/2 -
21. 2.824 5/2 -
22. 2.873 1/2 -
23. 2.954 3/2 -
24. 2.976 3/2 -
25. 2.992 7/2 -
26. 3.006 3/2 -
27. 3.036 11/2 -
28. 3.038 1/2 -
29. 3.040 3/2 +
Levels above 3.046 MeV were assumed to be overlapping.
***** JENDL-3.2 ****************************************
The cross sections for mt=67-79 were deleted and that for
mt=91 was modified so that the calculated spectra could
give a better fit to the measured ddx data.
*********************************************************
mt=16,22,28,103,107 (n,2n),(n,n'a),(n,n'p),(n,p) and (n,a)
cross sections
Calculated with tng.
Global optical-potential parameters were employed
for protons and alpha-particles /9,10/.
mt=102 Radiative capture cross section
Below 100 keV : Resonance parameters given (no background)
Above 100 keV : Based on the experimental data /11/-/15/.
mt=104 (n,d) cross section
The excitation function of the (n,p) cross section
calculated with tng was used for the (n,d) reaction by
shifting the threshold energy. The cross sections were
normalized to the experimental datum at 14.1 MeV /16/.
mt=105 (n,t) cross section
The excitation function of the (n,p) cross section
calculated with tng was used for the (n,t) reaction by
shifting the threshold energy. The cross sections were
normalized to the experimental datum at 14.7 MeV /17/.
mt=106 (n,He-3) cross section
Based on the experimental data /18,19/.
mt=203 : Total proton production
Sum of mt=28 and 103.
mt=204 : Total deuteron production
Equal to mt=104.
mt=205 : Total triton production
Equal to mt=105.
mt=206 : Total He-3 production
Equal to mt=106.
mt=207 : Total alpha production
Sum of mt=22 and 107.
mf=4 Angular distributions of secondary neutrons
mt=2,51-66
Optical and statistical-model calculations
the components of the direct process were added to
the levels of mt=51,52,57,61,64,65 by the DWBA
calculations.
mf=6 Energy-angle distributions of secondary particles
mt=16, 22, 28, 91, 203, 204, 205, 206, 207
Taken from the file-6 of the JENDL fusion file.
mf=12 Photon production multiplicities
mt=4,16,22,28,102,103,107
Calculated with tng.
For mt=102, modified by using gamma-ray intensity data
in ENSDF below thermal energy.
****** JENDL-3.3 ************************************
For mt=102, multiplicities were modified between 1.0e-5
and 5.59e+5 eV.
******************************************************
mf=14 Photon angular distributions
mt=4,16,22,28,102,103,107
Assumed to be isotropic.
mf=15 Photon energy distributions
mt=4,16,22,28,102,103,107
Calculated with tng.
For mt=102, modified by using gamma-ray intensity data
in ENSDF below thermal energy.
****** JENDL-3.3 ************************************
For mt=2, experimental data /22/ were inserted between
14 and 559 keV.
******************************************************
mf=32 Covariances of resolved resonance parameters
mt=151
Based on experimental data. /23/
mf=33 Covariance data
mt=1,2,4,16,22,28,51-66,91,102,103,104,105,106,107
Estimated from experimental data.
Refernces
1) Macklin, R.L.: Nucl. Sci. Eng., 89, 362 (1985).
2) Mugabghab, S.F., Divadeenam, M. and Holden, N.E.: "Neutron
Cross Sections", Vol. 1, Part A, Academic Press (1981).
3) Cierjacks, S., Forti, P., Kopsch, D., Kropp, L., Nebe, J.
and Unseld, H.: "High Resolution Total Cross Sections
for Na, Cl, K, V, Mn and Co between 0.5 and 30 MeV",
KfK-1000 (1968).
4) Pineo, W.F.E., Divadeenam, M., Bilpuch, E.G., Seth, K.K.
and Newson, H.W.: Ann. Phys., 84, 165 (1974).
5) Garg, J.B., Rainwater, J. and Havens, Jr., W.W.:
Nucl. Sci. Eng., 65, 76 (1978).
6) Fu, C.Y.: "A Consistent Nuclear Model for Compound and
Precompound Reactions with Conservation of Angular
Momentum", ORNL/TM-7042 (1980).
7) Fu, C.Y.: Private communication (1985).
8) Zhou Enchen, Huo Junde, Zhou Chunmei, Lu Xiane and
Wang Lizheng: Nucl. Data Sheets, 44, 463 (1985).
9) Perey, F.G.: Phys. Rev., 131, 745 (1963).
10) Huizenga, J.R. and Igo, G.J.: Nucl. Phys., 29, 462 (1962).
11) Garg, J.B., Macklin, R.L. and Halperin, J.: Phys. Rev.,
C18, 2079 (1978).
12) Dovbenko, A.G., Kolesov, V.E., Koroleva, V.P., Tolstikov,
V.A.: Atom. Energ., 26, 67 (1969).
13) Menlove, H.O., Coop, K.L., Grench, H.A. and Sher, R.:
Phys. Rev., 163, 1299 (1967).
14) Schwerer, O., Winkler-Rohatsch, M., Warhanek, H. and
Winkler, G.: Nucl. Phys., A264, 105 (1976).
15) Budnar, M., Cvelbar, F., Hodgson, E., Hudoklin, A.,
Ivkovic, V., Likar, A., Mihailovic, M.V., Martincic, R.,
Najzer, M., Perdan, A., Potokar, M. and Ramsak, V.:
"Prompt Gamma-ray Spectra and Integarted Cross Sections
for the Radiative Capture of 14 MeV Neutrons for 28
Natural Targets in the Mass Region from 12 to 208",
INDC(YUG)-6 (1979).
16) Colli, L., Iori, I., Micheletti, S. and Pignanelli, M.:
Nuovo. Cim., 21, 966 (1962).
17) Sudar, S. and Csikai, J.: Nucl. Phys., A319, 157 (1979).
18) Diksic, M., Strohal, P. and Slaus, I.: J. Inorg. Nucl.
Chem., 36, 477 (1974).
19) Wu, C.H., Woelfle, R. and Qaim, S.M.: Nucl. Phys., A329,
63 (1979).
20) Chiba, S et al.: JAERI-M 92-027, p. 35 (1992)
21) Yamamuro, N.: JAERI-M 90-006 (1990)
22) Igashira, M.: Private communication (2000).
23) Shibata, K. et al.: JAERI-Research 98-045 (1998).