17-Cl- 35 KHI EVAL-MAR94 T.WATANABE DIST-MAY10 20090828 ----JENDL-4.0 MATERIAL 1725 -----INCIDENT NEUTRON DATA ------ENDF-6 FORMAT =========================================================== The data were taken from JENDL-3.3. =========================================================== HISTORY 94-3 Newly evaluated 00-10 JENDL-3.3 Compiled by K.Shibata (jaeri) ***** Modified parts for JENDL-3.3 ************************* (1,451) Updated. (3,251) Deleted. (4,2) Transformation matrix deleted. (5,16-91) Distributions at threshold were modified. ************************************************************ mf=1 General information mt=451 Comments and dictionary mf=2 Resonance parameters mt=151 resolved resonance parameters(below 226keV) Resolved resonance parameters for MLBW formula. Negative energy level parameters were adjusted to reproduce 2200m/s cross sections. Evaluation was mainly based on Macklin's/1/ data and Mughabghab's/2/ compilation. Below 226keV,(n,p) and (n,a) cross sections were given as background total cross section. calculated 2200-m/s cross sections and res. integrals (barns) 2200 m/s res. integ. total 64.2 - elastic 20.6 - capture 43.6 17.8 mf=3 Neutron cross sections Below 226 keV, resonance parameters were given. Above 226 keV, the total, elastic and inelastic scattering, and capture cross sections were calculated with the optical and statistical model code casthy/4/. Above 1.0MeV, direct/semidirect capture normalized to 0.349mb at 14MeV were added to casthys results/5/. Optical model parameters used in casthy calculation were shown as follows. depth (MeV) radius(fm) diffuseness(fm) ---------------------- ------------ --------------- V = 46.68-0.3459E , r0 = 4.743 , a0 = 0.308 Wi =-0.0007E**2 , ri = 0.0 , ai = 0.0 Ws = 3.584+1.224E , rs = 4.6874 , as = 0.338 Vso= 6.2 , rso= 3.9253 , aso= 0.638 The level scheme was adopted from ENSDF file/6/. no. energy(MeV) spin-parity beta2/beta3 gr. 0.0 3/2 + 1 1.2193 1/2 + 0.28 2 1.7632 5/2 + 0.15 3 2.6453 7/2 + 0.2 4 2.6936 3/2 + 0.25 5 3.0026 5/2 + 0.2 6 3.1626 7/2 - 0.25 7 3.9185 3/2 + 0.2 8 3.9432 9/2 + 0.2 9 3.9675 1/2 + 0.15 10 4.0592 3/2 - 0.25 11 4.1133 7/2 + 0.15 12 4.1734 5/2 - 0.2 13 4.1779 3/2 - 0.2 14 4.3473 9/2 - 15 4.6242 3/2 + 16 4.7679 7/2 - 17 4.8406 1/2 + 18 4.8544 1/2 + 19 4.8817 7/2 + 20 5.0104 1/2 - Levels above 5.02MeV 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. Cl- 35 Cl- 36 -------- -------- a (1/MeV) 5.205 5.434 spin cut-off param. 3.564 3.711 pairing energy (MeV) 1.860 0.0 normalization factor 344.94 370.41 e-joint (MeV) 7.542 3.561 The capture cross section was normalized to 3 millibarns at 100 keV. mt=16,22,28,32,103,104,105,106,107,111 (n,2n),(n,na),(n,np),(n,nd),(n,p),(n,d),(n,t),(n,he-3), (n,a),(n,2p) These cross sections were evaluated with modified egnash-2/7/ using f2=0.5 and following optical potential neutron :same as used in casthy proton :Perey's omp/8/ deutron :Perey-Perey's omp/9/ triton :Ragaini's omp/10/ he-3 :Luetzeshwab's omp/11/ alpha :Bock's omp/12/ and normalized to following data. (n,2n) 9.6 mb av. exp. data/13,14/ (n,p) 125.0 mb av. exp. data/16,17/ (n,d) 12.6 mb systematics/15/ (n,a) 117.0 mb av. exp. data/18/ Below 58.607keV, (n,p) cross section was calculated using koehlers resonance parameters/3/. Energy dependence of low energy (n,a) cross section was assumed as 1/v and normalized to 0.08mb at 2200 m/s./2/ mf=4 Angular distributions of secondary neutrons mt=2,16,22,28,32,51-70,91 Elastic and inelastic scattering cross section,(n,2n),(n,na), (n,np),(n,nd) Angular distributions were calculated with casthy for ela- stically and inelastically scattered neutrons. The direct inelastic scattering contribution was evaluated with dwucky/19/. deformation parameters used in dwucky calculation were evaluted from compilaiton/20,21/, and ENSDF half life data. As for (n,2n),(n,na),(n,np),(n,nd) isotropic distributions were assumed. mf=5 Energy distributions of secondary neutrons mt=16,22,28,32,91 For (n,2n),(n,na),(n,np),(n,nd) and continum inelastic scattering cross sections, secondary neutron energy distribution were calculated with egnash-2. References 1)R.L.Macklin et. at., PR C29,1996(1984) 2)S.F.Mughabghab et. al., Neutron Cross Section Vol.1 Part A Academic Press(1981) 3)P.E.Koehler PR/C44,1675(1991) 4)S.Igarasi,T.Fukahori JAERI-1321 (1991) 5)T.Nakagawa CAPDIR manual 6)Evaluated Nuclear Structural Data File 7)N.Yamamuro JAERI-M 90-006(1991) 8)F.G.Perey PR 131, 745(1963) 9)C.M.Perey,F.G.Perey PR 132, 752(1963) 10)R.C.Ragaini et. al. PR C2,1020(1970) 11)J.W.Luetzelscfwab et.al PR 180,1023(1964) 12)R.Bock et. al. NP A92, 539(1967) 13)Y.Ikeda et al. JAERI-1312(1988) 14)G.Peto AHP,24,93(1968) 15)R.A.Forrest AERE-R 12419(1986) 16)D.L.Allan NP 24,274(1961) 17)W.Scantl Scantl 18)W.Nagel Nagel 19)N.Yamamuro JAERI-M 88-140(1988) 20)S.Raman et.al. AND 42,1(1989) 21)R.H.Spear AND 42,55(1989)