32-GE- 73 KHI EVAL-MAR94 T.WATANABE
DIST-MAR02 REV2-JUL01 20010713
----JENDL-3.3 MATERIAL 3234
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
94-3 Newly evaluated
01-07 Compiled by K.Shibata for JENDL-3.3
********* modified parts for JENDL-3.3 *******************
(1,451) Updated.
(3,251) Deleted.
(4,2) Transformation matrix deleted.
(5,16-91) INT=22
************************************************************
mf=1 General information
mt=451 Comments and dictionary
mf=2 Resonance parameters
mt=151 Resolved resonance parameters
Resolved resonance parameters for MLBW formula (below 8.53 keV)
Negative energy level parameters were adjusted to reproduce
Koesters 2200m/s data/1/.
Level parameters were evaluated mainly based on Mughabghabs
compilation/2/.
calculated 2200-m/s cross sections and res. integrals (barns)
2200 m/s res. integ.
total 19.2 -
elastic 4.8 -
capture 14.4 62.3
mf=3 Neutron cross sections
Below 8.53keV, resonance parameters were given.
Above 8.53keV, the total, elastic and inelastic scattering, and
capture cross sections were calculated with the optical and
statistical model code casthy /3/.
Optical model parameters used in casthy calculation were as
follows.
depth (MeV) radius(fm) diffuseness(fm)
---------------------- ------------ ---------------
V = 52.07-0.7434E , r0 = 5.1155 , a0 = 0.492
Ws = 9.997+0.1299E , rs = 5.897 , as = 0.36
Vso= 10.99 , rso= 6.1436 , aso= 0.65
The level scheme was adopted from ENSDF file/4/.
no. energy(MeV) spin-parity beta2/beta3
gr. 0.0000 9/2 +
1 0.0133 5/2 + 0.17
2 0.0667 1/2 - 0.13
3 0.0688 7/2 + 0.13
4 0.3536 5/2 - 0.13
5 0.3640 3/2 - 0.11
6 0.3925 3/2 - 0.11
7 0.4991 7/2 + 0.11
8 0.5015 5/2 + 0.1
9 0.5511 5/2 + 0.1
10 0.5549 1/2 + 0.1
11 0.5976 5/2 -
12 0.6590 9/2 +
13 0.7417 7/2 -
14 0.7770 3/2 +
15 0.8090 5/2 -
16 0.8258 13/2 +
17 0.8680 11/2 +
18 0.8941 1/2 -
19 0.9040 1/2 -
20 0.9155 3/2 +
21 0.9317 5/2 +
22 0.9937 11/2 +
23 1.0260 13/2 +
24 1.0432 3/2 -
25 1.1305 9/2 -
26 1.1319 1/2 -
Levels above 1.14 MeV were assumed to be overlapping.
Parameters for the composite level density formula of Gilbert-
Cameron were evaluated.
Spin cut-off parameter c1 was taken as 0.146.
Ge- 73 Ge- 74
-------- --------
a (1/MeV) 14.970 13.550
spin cut-off param. 9.867 9.473
pairing energy (MeV) 1.360 3.240
normalization factor 2069.20 1898.60
E-joint (MeV) 7.828 10.660
The capture cross section were normalized using D0=82 eV and
Gg=0.145 eV, adopted from Mughabghabs compilation/2/.
Above 1 MeV,direct/semidirect capture cross section normalized
to 0.76mb at 14 MeV were added to casthys results/5/.
mt=16,17,22,28,32,103,104,105,106,107
(n,2n),(n,3n),(n,na),(n,np),(n,nd),(n,p),(n,d),(n,t),
(n,he-3),(n,a)
were evaluated with modified egnash-2/6/ using f2=1.2 and
following optical potential
neutron :same as used in casthy
proton :Perey's omp/7/
deutron :Lohr-Haeberli's omp/8/
triton :Becchetti-Greenless omp/9/
he-3 :Becchetti-Greenless omp/9/
alpha :Lemos omp/10/
and normalized to following data.
(n,na) 0.97 mb systematics/11/
(n,p) 20.7 mb Konno's exp. data/12/
(n,d+np) 4.77 mb Konno's exp. data/12/
(n,t) 0.36 mb systematics
(n,a) 7.79 mb systematics
mf=4 Angular distributions of secondary neutrons
mt=2,16,17,22,28,32,51-76,91
Elastic and inelastic scattering cross section,(n,2n),(n,3n),
(n,na),(n,np) and (n,nd)
Angular distributions were calculated with casthy for ela-
stically and inelastically scattered neutrons. The direct
inelastic scattering contribution were evaluated with
dwucky programm/13/. Deformation parameters used in dwucky
calculation were evaluated from compilations/14,15/ and
half life data from ensdf and adjusted to reproduce
ddx data/16/.
As for (n,2n),(n,3n),(n,na),(n,np) and (n,nd),isotropic
distributions was assumed.
mf=5 Energy distributions of secondary neutrons
mt=16,17,22,28,32,91
For (n,2n),(n,3n),(n,na),(n,np),(n,nd) and continum inelastic
scattering,secondary neutron energy distributions were
calculated with egnash-2.
References
1)L. Koester et. al. Z.Phys. A327,129(1987)
2)S.F. Mughabghab et. al., Neutron Cross Section Vol.1 Part A
Academic Press(1981)
3)S. Igarasi, T. Fukahori JAERI-1321 (1991)
4)Evaluated Nuclear Structural Data File
5)T. Nakagawa Capdir manual
6)N. Yamamuro JAERI-M 90-006(1991)
7)F.G. Perey PR 131, 745(1963)
8)J.M. Lohr, W. Haeberli NP A232, 381(1974)
9)F.D. Becchetti and Polarization Phenomena in Nuclear
G.W. Greenless Reaction 682(1971) Univ. Wisconsin
10)O.F. Lemos Orsay Rep.Ser.A No.136(1972)
11)R.A. Forrest AERE-R 12419(1986)
12)C. Konno et al JAERI-1329(1993)
13)N. Yamamuro JAERI-M 88-140(1988)
14)S. Raman et al. AND 42,1(1989)
15)R.H. Spear AND 42,55(1989)
16)A. Takahashi et.al. Oktavian data private com.