Fission Product Yield Data for the Transmutation of Minor Actinide ...

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FIG. 4.4.17. Post-neutron emission mass distributions from 238 U fission induced by neutrons (points are experimental data [4.4.27]; the lines are our calculations); neutron energies are given in the figure. 177
FIG. 4.4.18. Fragment mass distributions from spontaneous fission of 252 Cf (points are evaluated data [4.4.25]; the solid line is our calculations, as described in the text; the dashed line is the Wahl calculation [4.4.29]). FIG. 4.4.19. Fragment mass distributions for spontaneous fission of nuclei (points are evaluated data [4.4.25]; lines are the calculations as described in the text). 178
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Fission Product Yield Data for the
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AFGHANISTAN ALBANIA ALGERIA ANGOLA
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COPYRIGHT NOTICE All IAEA scientifi
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CONTRIBUTING AUTHORS Denschlag, J.-
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3.2.1. Introduction . . . . . . . .
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6. BENCHMARK EXERCISE . . . . . . .
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However, this CRP entered an entire
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‘Provisional masses’ are determ
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Three scientists were invited to pa
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8 (d) Prompt or delayed neutron emi
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[2.1.40] ITKIS, M.G., OGANESSIAN, Y
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[2.1.96] PATE, B.D., et al., Distri
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[2.1.152] JACOBS, E., et al., Produ
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16 2.2. MEASUREMENTS OF THE ENERGY
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FIG. 2.2.3. 94 Sr: best experimenta
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FIG. 2.2.15. 132 Te: best experimen
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FIG. 2.2.27. 146 Ba: best experimen
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3. EVALUATIONS 3.1. ACTINIDE NUCLEO
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3.1.2. Statistical model At least t
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J Â K=-J 2 2 2 ^ sym Krot ( U, J)
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nuclei with N > 144. However, for h
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neutron number. The observed fissio
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FIG. 3.1.6. 235 U(n,f) fission cros
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FIG. 3.1.10. 237 Np(n,f) fission cr
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from higher fission chances [3.1.43
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[3.1.48] DUSHIN, V.N., et al., Stat
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where Y S is our new standard, and
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TABLE 3.2.2. EVALUATED REFERENCE FI
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TABLE 3.2.2. EVALUATED REFERENCE FI
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TABLE 3.2.3. EVALUATED REFERENCE YI
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TABLE 3.2.3. EVALUATED REFERENCE YI
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The comparisons of our evaluated da
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TABLE 3.2.4. COMPARISON OF RECOMMEN
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TABLE 3.2.8. COMPARISON OF THE UNCE
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REFERENCES TO SECTION 3.2 [3.2.1] I
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where N C , N U are the modified an
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activities were recorded with a pro
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3.3.4. Results and discussion The r
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FIG. 3.3.10. Li Ze et al. data: com
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96 Annex 3.3.1 EVALUATED EXPERIMENT
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Li Ze et al. [3.3.8] Thierens et al
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100 Annex 3.3.3 EVALUATED DATA SET
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The range of target nuclides availa
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condensation of cross-sections by t
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(h) REFERENCE (C,80KIEV,171,1980) i
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uncertainties of the calculation. T
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4. SYSTEMATICS AND MODELS FOR THE P
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FIG. 4.1.2. 235 U total cross-secti
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FIG. 4.1.9. Total and mode separate
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4.2. SYSTEMATICS OF FISSION PRODUCT
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A - = (PA - NT)/2 (4.2.1b) 4.2.2.3.
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FIG. 4.2.4(a). 238 U + 5.5 MeV n, L
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FIG. 4.2.8(a). U238 + 300 MeV p, LS
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TABLE 4.2.1. EQUATIONS FOR SYSTEMAT
Page 138 and 139: values (points) and the derived fun
Page 140 and 141: distributions. Values of N(A) seldo
Page 142 and 143: FIG. 4.2.19. Systematic Z P paramet
Page 144 and 145: FIG. 4.2.21. Systematic Z P paramet
Page 146 and 147: FIG. 4.2.23. Nuclear charge displac
Page 148 and 149: FIG. 4.2.24. Number of protons emit
Page 150 and 151: epresenting model values and thus s
Page 152 and 153: FIG. 4.2.36. n T(A) for CF249T. FIG
Page 154 and 155: FIG. 4.2.41. U235T, line: model; po
Page 156 and 157: The FAST subroutine in the CYFP pro
Page 158 and 159: [4.2.28] BELHAFAF, D., et al., Kine
Page 160 and 161: 4.3. FIVE GAUSSIAN SYSTEMATICS FOR
Page 162 and 163: Derived from measured data Fitted r
Page 164 and 165: FIG. 4.3.7. Mass distribution of 23
Page 166 and 167: FFIG. 4.3.12. Mass distribution of
Page 168 and 169: 4.4. PHENOMENOLOGICAL MODEL FOR FRA
Page 170 and 171: where = 2mE is the wavelength, E
Page 172 and 173: FIG. 4.4.4. Fragment mass distribut
Page 176 and 177: fragment mass distributions are des
Page 180 and 181: FIG. 4.4.10. Fragment mass distribu
Page 182 and 183: P LD È Ê * E - 44. 7ˆ ˘ = Í1 +
Page 184 and 185: FIG. 4.4.13. Pre-neutron emission m
Page 186 and 187: FIG. 4.4.15. Post-neutron emission
Page 190 and 191: fragment mass and charge distributi
Page 192 and 193: of the energy dependence of the fus
Page 194 and 195: 4.5. MODAL APPROACH TO THE DESCRIPT
Page 196 and 197: This information was used for the p
Page 198 and 199: two neighbouring isotopes at differ
Page 200 and 201: FIG.4.5.2. Experimental relative ma
Page 202 and 203: Frequently, the yields Y i (M) are
Page 204 and 205: the nine optimum description parame
Page 206 and 207: TABLE 4.5.6. RELATIVE CONTRIBUTIONS
Page 208 and 209: TABLE 4.5.8. RELATIVE CONTRIBUTIONS
Page 210 and 211: Extracted values of s 2 M,S demonst
Page 212 and 213: FIG. 4.5.10. Fission fragment charg
Page 214 and 215: FIG. 4.5.12. Unchanged charge densi
Page 216 and 217: FIG. 4.5.16. Mass yield variance fo
Page 218 and 219: FIG. 4.5.20. Experimental mass yiel
Page 220 and 221: [4.5.24] GOVERDOVSKII, A.A., MITROF
Page 222 and 223: TABLE 4.6.1. FISSION PRODUCT YIELD
Page 224 and 225: TABLE 4.6.2. FIT PARAMETER VALUES O
Page 226 and 227: FIG. 4.6.2. Charge distributions fo
Page 228 and 229: model which is elucidated elsewhere
Page 230 and 231: the agreement is better. The observ
Page 232 and 233: inner barrier is much lower than th
Page 234 and 235: e determined in a self-consistent m
Page 236 and 237: FIG. 4.6.11. Overview of the coupli
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cross-section also has to be incorp
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FIG. 4.6.16. Same as Fig. 4.6.15, b
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FIG. 4.6.20. Pre-neutron emission m
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present have a reasonable contribut
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TABLE 4.6.5. ACCURACIES OBTAINED FR
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[4.6.7] BEIJERS, J.P.M., et al., Se
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5. NEW MODELS AND SYSTEMATICS: DEFI
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therefore his benchmark calculation
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mass distributions and practically
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5.2. BENCHMARK EXERCISE 5.2.1. Benc
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thorough and detailed analysis of t
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the fissioning nucleus and the numb
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should be undertaken — such a stu
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experimental method in order to der
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256 Valley heights and peak-to-vall
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FIG. 6.2.3. Benchmark exercise, par
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260 Wahl uncert. margins Wahl uncer
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264 Wahl uncert. margins (adj. Wahl
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Wahl (1.6-160 MeV): Distributions a
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TABLE 6.2.2. 238 U PRE-NEUTRON EMIS
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as most features are very similar t
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FIG. 6.2.14. Benchmark exercise, pa
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278 REFERENCES TO SECTION 6 [6.1] B
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As mentioned above, the mass distri
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I.3.2.6. Liu Conggui et al. [I.8] M
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after prompt-neutron emission, and
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286 Zöller (1995) 89-110 MeV, post
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(1) Data were linearly interpolated
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1. 290 Annex to Appendix I RECOMMEN
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1.2. E n = 5.5 MeV 292 Nagy et al.
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1.3. E n ª 8 MeV 294 Chapman (1978
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1.5. E n = 14-15 MeV 296 Daroczy et
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1.7. E n = 27.5 (22-33) MeV, Zölle
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1.9. E n = 99.5 (89-110) MeV, Zöll
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3. 302 239 Pu NEUTRON INDUCED FISSI
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Appendix II DATA ADJUSTMENT FOR MAS
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Vivès [II.8], Zöller [II.7] and
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Annex 1 to Appendix II ADJUSTED DAT
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Zöller (1995) [II.7] E n = 13 (11.
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E n = 50 (45-55) MeV Post-neutron e
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Äystö et al. (1998) [II.9] E p =
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E n = 1.60 MeV Pre-neutron emission
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E n = 27.5 (22-33) MeV Post-neutron
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E n = 99.5 (89-110) MeV Post-neutro
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Appendix III FISSION YIELD SYSTEMAT
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FIG. III.6. Dependence of chain yie
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TABLE III.2. Ln(y)-LINEAR(E) FIT CO
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FIG. III.14. Dependence of paramete
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FIG. III.26. Comparison of the mass
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FIG. III.38. Comparison of the mass
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TABLE III.3. QUADRATIC FUNCTION FIT
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Uncertainty ratio or uncertainty Ad
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CONTENTS OF THE CD-ROM The attached
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This publication reports on a coord
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