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

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FFIG. 4.3.12. Mass distribution of 248 Cm fission by 20 MeV protons. FIG. 4.3.13. Mass distribution of 238 U by 340 MeV fission. FIG. 4.3.14. Mass distribution of 252 Cf spontaneous fission. 155
distributions of various kinds of fissioning systems and compared them with the measured data. The comparisons show good agreement between the calculations and the measurements, including fission by high energy neutrons and protons. Benchmark calculations were proposed during the CRP (see Section 5.2 and the attached CD-ROM for details). The present systematics was used to perform the benchmark calculations. As the systematics cannot give the mass distribution for pre-neutron emission, only the mass yields for postneutron emission were calculated for the benchmark exercise. 156 REFERENCES TO SECTION 4.3 [4.3.1] MORIYAMA, H., OHNISHI, T., Systematics of Fission Fragment Mass-Yield Curves, Tech. Rep. No. 166, Kyoto University (1974). [4.3.2] KATAKURA, J., A systematics of fission product mass yields with 5 Gaussian functions, JAERI-Research 2003–004 (2003). [4.3.3] ZÖLLER, C.M., et al., “Fission fragment properties in the 238 U(n,f) reaction at incident neutron energies from 1 MeV to 500 MeV”, VII School on Neutron Physics, Vol. I, Ratmino, JINR, Dubna (1995) 130. [4.3.4] MEYERS, W.D., SWIATECKI, W.J., Nuclear masses and deformations, Nucl. Phys. 81 (1966) 1–60. FIG. 4.3.15. Mass distribution of 254 Fm spontaneous fission. [4.3.5] WAHL, A.C., Los Alamos National Laboratory, USA, personal communication, 1999. [4.3.6] SCHMITT, H.W., et al., Fragment energy correlation measurements for 252Cf spontaneous fission and 235U thermal-neutron fission, Phys. Rev. 141 (1966) 1146–1160. [4.3.7] GELTENBORT, P., et al., Precision measurements of mean kinetic energy release in thermalneutron-induced fission of 233 U, 235U and 239Pu, Radiat. Eff. 93 (1986) 57. [4.3.8] DICKENS, J.K., McCONNEL, J.W., Yields of fission products produced by thermal-neutron fission of 245Cm, Phys. Rev. C 23 (1981) 331–350. [4.3.9] GINDLER, J.E., et al., Mass distributions in monoenergetic-neutron-induced fission of 239Pu, Phys. Rev. C 27 (1983) 2058–2062. [4.3.10] WINKELMANN, I., AUMANN, D.C., Fission of 242 Pu with 15.1-MeV neutrons, Phys. Rev. C 30 (1984) 934–940. [4.3.11] OHTSUKI, T., et al., Mass yield curves in lowenergy proton-induced fission of 233 U, 235 U, 236 U, 237 239 242 244 241 243 Np, Pu, Pu, Pu, Am, and Am, Phys. Rev. C 44 (1991) 1405–1423. [4.3.12] QIN, Z., et al., Mass yield distributions in proton-induced fission of 248Cm, Radiochim. Acta 84 (1999) 115–120. [4.3.13] STEVENSON, P.C., et al., Further radiochemical studies of the high-energy fission products, Phys. Rev. 111 (1958) 886–891. [4.3.14] ENGLAND, T.R., RIDER, B.F., Evaluation and compilation of fission product yields 1993, Rep. LA-UR-94-3106, ENDF-349, Los Alamos National Laboratory, NM (1994).
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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
Page 115 and 116: condensation of cross-sections by t
Page 117 and 118: (h) REFERENCE (C,80KIEV,171,1980) i
Page 119 and 120: uncertainties of the calculation. T
Page 122 and 123: 4. SYSTEMATICS AND MODELS FOR THE P
Page 124 and 125: FIG. 4.1.2. 235 U total cross-secti
Page 126 and 127: FIG. 4.1.9. Total and mode separate
Page 128 and 129: 4.2. SYSTEMATICS OF FISSION PRODUCT
Page 130 and 131: A - = (PA - NT)/2 (4.2.1b) 4.2.2.3.
Page 132 and 133: FIG. 4.2.4(a). 238 U + 5.5 MeV n, L
Page 134 and 135: FIG. 4.2.8(a). U238 + 300 MeV p, LS
Page 136 and 137: 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 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 188 and 189: FIG. 4.4.17. 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
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FIG. 4.5.16. Mass yield variance fo
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FIG. 4.5.20. Experimental mass yiel
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[4.5.24] GOVERDOVSKII, A.A., MITROF
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TABLE 4.6.1. FISSION PRODUCT YIELD
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TABLE 4.6.2. FIT PARAMETER VALUES O
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FIG. 4.6.2. Charge distributions fo
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model which is elucidated elsewhere
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the agreement is better. The observ
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inner barrier is much lower than th
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e determined in a self-consistent m
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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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