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

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FIG. III.38. Comparison of the mass distribution 238 Ul ffission calculated with adjusted and systematics parameters at 160.0 MeV. FIG. III.39. Comparison of the mass distribution 238 Ul ffission calculated with adjusted and systematics parameters at 200.0 MeV. FIG. III.40. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 1.5 MeV. FIG. III.41. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 5.5 MeV. FIG. III.42. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 8.1 MeV. FIG. III.C.43. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 8.3 MeV. 333
FIG. III.44. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 11.3 MeV. FIG. III.45. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 14.4 MeV. FIG. III.46. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 14.9 MeV. 334 FIG. III.47. Comparison of the experimental mass distribution for 238 U fission with equivalent data from calculated systematics parameters at 22.0 MeV. the data measured by Zöller using the kinetic method [III.1] with the data measured by radiochemistry [III.2–III.8]. The c 2 for fitting the measured data with adjusted and systematics parameters are listed in Table III.4. These data are all smaller than 1.0 for all energy points with adjusted parameters and for most cases with systematics parameters, except at 13, 20 and 63 MeV, where they are 1.683, 1.800 and 5.820, respectively. All of these data and figures showing the dependence of parameters s 1 and D 1 on energy indicate that there is some systematic difference for the data at 63.0 MeV compared with others. III.5. UNCERTAINTY STUDIES IN THE SYSTEMATICS The covariance of the data to be fitted is transferred according to the following equations: C = ( F V F) F V Y Y = FC T V ( F V F) V Y = FV C F T -1 -1 T -1 Y Y T -1 -1 C = Y where Y is the data vector to be fitted, V Y is its covariance matrix, C is the fitting coefficient vector, V C is its covariance matrix, and F is the sensitivity matrix. The following transformations are included: (a) From experimental data covariance V Y to Gaussian fit coefficients (c1) via model fitting of 5 or 3 Gaussians;
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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
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values (points) and the derived fun
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distributions. Values of N(A) seldo
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FIG. 4.2.19. Systematic Z P paramet
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FIG. 4.2.21. Systematic Z P paramet
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FIG. 4.2.23. Nuclear charge displac
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FIG. 4.2.24. Number of protons emit
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epresenting model values and thus s
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FIG. 4.2.36. n T(A) for CF249T. FIG
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FIG. 4.2.41. U235T, line: model; po
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The FAST subroutine in the CYFP pro
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[4.2.28] BELHAFAF, D., et al., Kine
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4.3. FIVE GAUSSIAN SYSTEMATICS FOR
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Derived from measured data Fitted r
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FIG. 4.3.7. Mass distribution of 23
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FFIG. 4.3.12. Mass distribution of
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4.4. PHENOMENOLOGICAL MODEL FOR FRA
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where = 2mE is the wavelength, E
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FIG. 4.4.4. Fragment mass distribut
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fragment mass distributions are des
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FIG. 4.4.10. Fragment mass distribu
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P LD È Ê * E - 44. 7ˆ ˘ = Í1 +
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FIG. 4.4.13. Pre-neutron emission m
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FIG. 4.4.15. Post-neutron emission
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FIG. 4.4.17. Post-neutron emission
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fragment mass and charge distributi
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of the energy dependence of the fus
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4.5. MODAL APPROACH TO THE DESCRIPT
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This information was used for the p
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two neighbouring isotopes at differ
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FIG.4.5.2. Experimental relative ma
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Frequently, the yields Y i (M) are
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the nine optimum description parame
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TABLE 4.5.6. RELATIVE CONTRIBUTIONS
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TABLE 4.5.8. RELATIVE CONTRIBUTIONS
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Extracted values of s 2 M,S demonst
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FIG. 4.5.10. Fission fragment charg
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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
Page 293 and 294: I.3.2.6. Liu Conggui et al. [I.8] M
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Page 297 and 298: 286 Zöller (1995) 89-110 MeV, post
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Page 301 and 302: 1. 290 Annex to Appendix I RECOMMEN
Page 303 and 304: 1.2. E n = 5.5 MeV 292 Nagy et al.
Page 305 and 306: 1.3. E n ª 8 MeV 294 Chapman (1978
Page 307 and 308: 1.5. E n = 14-15 MeV 296 Daroczy et
Page 309 and 310: 1.7. E n = 27.5 (22-33) MeV, Zölle
Page 311 and 312: 1.9. E n = 99.5 (89-110) MeV, Zöll
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Page 316 and 317: Appendix II DATA ADJUSTMENT FOR MAS
Page 318 and 319: Vivès [II.8], Zöller [II.7] and
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Page 322 and 323: Zöller (1995) [II.7] E n = 13 (11.
Page 324 and 325: E n = 50 (45-55) MeV Post-neutron e
Page 326 and 327: Äystö et al. (1998) [II.9] E p =
Page 328 and 329: E n = 1.60 MeV Pre-neutron emission
Page 330 and 331: E n = 27.5 (22-33) MeV Post-neutron
Page 332 and 333: E n = 99.5 (89-110) MeV Post-neutro
Page 334 and 335: Appendix III FISSION YIELD SYSTEMAT
Page 336 and 337: FIG. III.6. Dependence of chain yie
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Page 340 and 341: FIG. III.14. Dependence of paramete
Page 342 and 343: FIG. III.26. Comparison of the mass
Page 346 and 347: TABLE III.3. QUADRATIC FUNCTION FIT
Page 348 and 349: Uncertainty ratio or uncertainty Ad
Page 350: CONTENTS OF THE CD-ROM The attached
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