19-K - 40
19-K - 40 FUJI E.C. EVAL-MAY87 H.NAKAMURA
DIST-MAR02 REV3-MAY01 20010517
----JENDL-3.3 MATERIAL 1928
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-05 Newly evaluated by H.Nakamura (fuji electric co. ltd.)
94-02 JENDL-3.2
Total cross section was calculated by T. Watanabe (khi).
Inelastic scattering cross sections were calculated by
K.Shibata (jaeri).
Data were compiled by K.Shibata.
***** modified parts for JENDL-3.2 ****************************
(3,1),(3,4),(3,51-91),(3,251),(4,2),(4,51-55)
new optical and statistical model cal.
(3,2) total - nonelastic
****************************************************************
01-04 JENDL-3.3
Gamma-ray production data were evaluated and compiled
by K. Shibata
***** modified parts for JENDL-3.3 ****************************
(1,451) Updated
(3,251) Deleted.
(4,2) Transformation matrix deleted.
(5,16-91) INT=22.
(12,16-107) Added.
(14,16-107) Added.
(15,16-107) Added.
****************************************************************
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 mt=151 Resonance parameters: (not given )
mf=3 Neutron cross sections
Below 30 keV
Assumed or interpolated cross sections,guided by
those of k-39:
(10**-5) (2200m/s) (5.10**2) (3.10**4) res.int
mt=2 2.75b 2.75 b 2.75 b 2.75 b -
mt=102 1509.0 b 30.0 b /1/ 0.2 b 0.023 b 13.45 b
mt=103 370.0 b 4.4 b /1/ 0.012 b 0.012 b -
mt=107 2.2 b 0.39 b /1/ 0.04 b 0.015 b -
mt=1 1884.0 b 37.54 b 3.016 b 2.8 b -
30 keV - 1.0 MeV
mt=1,2,4,102 : Calculated with casthy code /2/.
mt=103 : 0.012 b, Guided by measurements of H.Weigmann/3/.
Above 30 keV.
mt=1,2,4,51-91,102
Total, elastic, inelastic and capture calculation with
casthy code /2/, considering the competition with the
the threshold reaction channels.
Optical potential parameters of C.Y.Fu/3/ are used.
The spherical optical potential parameters :
V = 46.72 Vso= 5.37 (MeV)
Ws= 9.13 Wv = 0.0 (MeV)
r =rso= 1.26 rs = 1.39 (fm)
a =aso= 0.76 b = 0.40 (fm)
mt=102 capture data are normalized to 4.2 mb at 200 keV.
The discrete level scheme taken from ref. /4/ :
no. energy(MeV) spin-parity
(g.s.) 0.0 4 -
1 0.0296 3 -
2 0.800 2 -
3 0.892 5 -
4 1.644 0 +
5 1.959 2 +
Continuum levels assumed above 2.1 MeV. The level
density parameters of Asano et al./5/ are used.
***** JENDL-3.2 ********************************************
The total and inelastic scattering cross sections were cal-
culated by using the omp set determined by T. Watanabe.
V = 54.36 - 0.325En (MeV)
Ws= 2.258 + 0.1698En (MeV)
Vso=3.341 (MeV)
r =1.20 ,a =0.658 (fm)
rs =1.32 ,b =0.602 (fm)
rso=1.10 ,aso=0.406 (fm)
The cross sections of mt=16,22,28,103,107 in JENDL-3.1 were
considered as the competing process for the statistical model
calculation.
************************************************************
mt=16(n,2n), 22(n,n'a), 28(n,n'p), 103(n,p), 107(n,a)
Based on the statistical model calculations with gnash
code /6/, without the precompound reaction correction.
transmission coefficients for proton and alpha particle
are calculated by using the omp of Becchetti-Grgeenlees
/7/ and Huizenga-Igo/8/, respectively.
Level density parameters are based on built -in values.
mf=4 Angular distributions of secondary neutrons
mt=2 Calculated with optical model (casthy).
mt=51-55 Calculated with Hauser-Feshbach formula(casthy)
mt=16,22,28 Isotropic in the laboratory system.
mt=91 Isotropic distributions in cm were converted
to the distributions in lab.
mf=5 Energy distributions of secondary neutrons
mt=16,22,28,91,103,107 Evaporation spectra.
mf=12 Photon production multiplicities
mt=16,22,28,103,107
Multiplicities were calculated by using the egnash code
/10/.
mt=102
Multiplicities were calculated by using the casthy code
/2/.
mt=51-55
Transition probability arrays were given.
mf=14 Photon angular distributions
mt=16,22,28,51-55,91,102,103,107
Isotropic
mf=15 Continuous photon energy spectra
mt=16,22,28,103,107
Multiplicities were calculated by using the egnash code
/10/.
mt=102
Multiplicities were calculated by using the casthy code
/2/.
References
1) Mughabghab, S.F. et al.: Neutron cross section, Vol.1 (1981).
2) Igarasi, S.: J. Nucl. Sci. Tech., 12, 67 (1975).
3) Weigmann, H.: NESTOR data.
4) Fu, C.Y.: Atom. Data and Nucl. Data Tables., 17, 127 (1976).
5) Lederer, C.M. et al.: Table of isotopes. 7th edit.
6) Asano et al.: private communication.
7) Young, P.G. and Arthur, E.D.: LA-6947 (1977).
8) Becchetti, Jr. and Greenlees, G.W.: Polarization phenomena
in nuclear reactions, p.682 (1971).
9) Huizenga, Jr. and Igo, G.J.: Nucl. Phys., 29, 462 (1962).
10) Yamamuro, N.: JAERI-M 90-006 (1990).